Princess Charlotte may be a "very easy" and "sweet" baby at the moment, but the Duke of Cambridge is bracing himself for parenting challenges as she gets older.
Prince William spoke about his nine-month-old daughter and two-year-old son, Prince George, at the Principality Stadium in Cardiff ahead of the RBS 6 Nations Wales v France game.
When asked how the little ones are getting on, he reportedly said: "Very well. No broken bones so far but they are trying - running around and pushing things and jumping."
The Duke and Duchess of Cambridge with Prince George and Princess Charlotte
He added: "Please tell me it gets easier. Charlotte is very easy, she is sweet.
"But all the fathers say to me 'just you wait, when they get to nine or 11 they get crazy'. I'm looking forward to it. There will be some drama."
This isn't the first time Prince William has suggested his children are an energetic pair.
In December he said: "We'll go to church as a family on Christmas Day as we always do. George will be bouncing around like a rabbit.
"[We'll have] two children, one who suddenly appreciates Christmas, which could be quite challenging. But I'm looking forward to it."
Princess Charlotte
Princess Charlotte Before Her First Birthday(01 of27)
Princess Charlotte of Cambridge looks up on a chair as her mother Catherine, Duchess of Cambridge takes her photo ahead of her first birthday on May 2, 2016 at Anmer Hall on April 2016 in Norfolk, England. The young Princess will celebrate her first birthday on May 2. (credit:HRH The Duchess of Cambridge)
Princess Charlotte Before Her First Birthday(02 of27)
Princess Charlotte of Cambridge looks up with her hands placed on a chair as her mother Catherine, Duchess of Cambridge takes her photo ahead of her first birthday on May 2, 2016 at Anmer Hall on April 2016 in Norfolk, England. The young Princess will celebrate her first birthday on May 2. (credit:HRH The Duchess of Cambridge)
Princess Charlotte Before Her First Birthday(03 of27)
Princess Charlotte of Cambridge looks up as her mother Catherine, Duchess of Cambridge takes her photo ahead of her first birthday on May 2, 2016 at Anmer Hall on April 2016 in Norfolk, England. The young Princess will celebrate her first birthday on May 2. (credit:HRH The Duchess of Cambridge)
Princess Charlotte Before Her First Birthday(04 of27)
Princess Charlotte of Cambridge looks on as she walks while pushing her toy blocks across the lawn outside as her mother Catherine, Duchess of Cambridge takes her photo ahead of her first birthday on May 2, 2016 at Anmer Hall on April 2016 in Norfolk, England. The young Princess will celebrate her first birthday on May 2. (credit:HRH The Duchess of Cambridge)
Prince George & Princess Charlotte Of Cambridge - Official Photographs Released(05 of27)
AMMER, ENGLAND - MAY 2015: In this undated handout image released by the Duke and Duchess of Cambridge, Prince George and Princess Charlotte at Anmer Hall in mid-May in Norfolk, England. (Photo by HRH The Duchess of Cambridge via Getty Images)NEWS EDITORIAL USE ONLY. NO COMMERCIAL USE (including any use in merchandising, advertising or any other non-editorial use including, for example, calendars, books and supplements). This photograph is provided to you strictly on condition that you will make no charge for the supply, release or publication of it and that these conditions and restrictions will apply (and that you will pass these on) to any organisation to whom you supply it. All other requests for use should be directed to the Press Office at Kensington Palace in writing. (credit:Handout via Getty Images)
Prince George & Princess Charlotte Of Cambridge - Official Photographs Released(06 of27)
AMMER, ENGLAND - MAY 2015: In this undated handout image released by the Duke and Duchess of Cambridge, Prince George and Princess Charlotte at Anmer Hall in mid-May in Norfolk, England. (Photo by HRH The Duchess of Cambridge via Getty Images)NEWS EDITORIAL USE ONLY. NO COMMERCIAL USE (including any use in merchandising, advertising or any other non-editorial use including, for example, calendars, books and supplements). This photograph is provided to you strictly on condition that you will make no charge for the supply, release or publication of it and that these conditions and restrictions will apply (and that you will pass these on) to any organisation to whom you supply it. All other requests for use should be directed to the Press Office at Kensington Palace in writing. (credit:Handout via Getty Images)
Prince George & Princess Charlotte Of Cambridge - Official Photographs Released(07 of27)
AMMER, ENGLAND - MAY 2015: In this undated handout image released by the Duke and Duchess of Cambridge, Prince George and Princess Charlotte at Anmer Hall in mid-May in Norfolk, England. (Photo by HRH The Duchess of Cambridge via Getty Images)NEWS EDITORIAL USE ONLY. NO COMMERCIAL USE (including any use in merchandising, advertising or any other non-editorial use including, for example, calendars, books and supplements). This photograph is provided to you strictly on condition that you will make no charge for the supply, release or publication of it and that these conditions and restrictions will apply (and that you will pass these on) to any organisation to whom you supply it. All other requests for use should be directed to the Press Office at Kensington Palace in writing. (credit:Handout via Getty Images)
Prince George & Princess Charlotte Of Cambridge - Official Photographs Released(08 of27)
AMMER, ENGLAND - MAY 2015: In this undated handout image released by the Duke and Duchess of Cambridge, Prince George and Princess Charlotte at Anmer Hall in mid-May in Norfolk, England. (Photo by HRH The Duchess of Cambridge via Getty Images)NEWS EDITORIAL USE ONLY. NO COMMERCIAL USE (including any use in merchandising, advertising or any other non-editorial use including, for example, calendars, books and supplements). This photograph is provided to you strictly on condition that you will make no charge for the supply, release or publication of it and that these conditions and restrictions will apply (and that you will pass these on) to any organisation to whom you supply it. All other requests for use should be directed to the Press Office at Kensington Palace in writing. (credit:Handout via Getty Images)
Britain Royal Baby(09 of27)
FILE - In this Saturday, May 2, 2015. file photo the newborn baby princess, born to parents Kate Duchess of Cambridge and Prince William, is carried in a car seat by her father from The Lindo Wing of St. Mary's Hospital, in London Britain's newborn princess has been named Charlotte Elizabeth Diana it was announced on Monday May 4. (John Stillwell/Pool via AP, File) (credit:ASSOCIATED PRESS)
Princess Charlotte Birth Certificate - 5/5/15(10 of27)
Photo by: KGC-375/STAR MAX/IPx 5/5/15 The birth certificate of Princess Charlotte of Cambridge which was signed by her father, Prince William The Duke of Cambridge at Kensington Palace today and witnessed by a Registrar from Westminster Register Office. (London, England, UK) (credit:KGC-375/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(11 of27)
Photo by: KGC-107/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-107/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(12 of27)
Photo by: KGC-03/STAR MAX/IPx 5/2/15 The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(13 of27)
Photo by: KGC-107/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-107/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(14 of27)
Photo by: KGC-03/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(15 of27)
Photo by: KGC-03/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(16 of27)
Photo by: KGC-03/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(17 of27)
Photo by: KGC-03/STAR MAX/IPx 5/2/15 The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(18 of27)
Photo by: KGC-03/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(19 of27)
Photo by: KGC-03/STAR MAX/IPx 5/2/15 The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(20 of27)
Photo by: KGC-107/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-107/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(21 of27)
Photo by: KGC-03/STAR MAX/IPx 5/2/15 The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(22 of27)
Photo by: KGC-03/STAR MAX/IPx 5/2/15 The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(23 of27)
Photo by: KGC-03/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(24 of27)
Photo by: KGC-03/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(25 of27)
Photo by: KGC-03/STAR MAX/IPx 5/2/15 The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(26 of27)
Photo by: KGC-107/STAR MAX/IPx 5/2/15 The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-107/STAR MAX/IPx)
Princess of Cambridge born at St. Mary's Hospital - 5/2/15(27 of27)
Photo by: KGC-03/STAR MAX/IPx The Princess of Cambridge is seen outside the Lindo Wing of St. Mary's Hospital with her parents Prince William The Duke of Cambridge and Catherine The Duchess of Cambridge. The Princess was born on Saturday, May 2nd, 2015 at 8:34 AM weighing 8lbs. 3oz. (Star Max/IPX via AP Images) (credit:KGC-03/STAR MAX/IPx)