The 46-year-old, famously known for her role in Charlie's Angels, shared the news on Instagram on 27 August with a precious photo of her holding her son Rockwell Lloyd Liu.
Liu's rep confirmed to PEOPLE: "Rockwell Lloyd Liu was brought into the world via gestational carrier. Mum and baby are healthy and happy."
A "gestational surrogate" is when a surrogate is implanted with an embryo created by IVF, using the intended mother's egg and donor sperm.
Liu, currently starring in Elementary, captioned the snap: "Introducing the new little man in my life, my son Rockwell Lloyd Liu. In ❤️!"
She later posted a similar black and white snap of her and her son on Twitter, cradling him in an animal-printed blanket.
Although revealing the news via social media, the actress previously revealed she finds it hard to keep up.
She said, according to the Mirror: "'It's so hard to keep up with emails and lines and a 14-16 hour day of work. I'm not a daily Instagram or Twitter or Facebook person."
The actress is very private about her love life, but has most recently been linked to Israeli-American hedge fund billionaire Noam Gottesman according to People magazine.
SEE ALSO:
Style Icon: Lucy Liu
2013 American Ballet Theatre Opening Night Spring Gala(01 of32)
NEW YORK, NY - MAY 13: Lucy Liu attends the 2013 American Ballet Theatre Opening Night Spring Gala at Lincoln Center on May 13, 2013 in New York City. (Photo by Monica Schipper/FilmMagic) (credit:Getty Images)
2013 CBS Upfront(02 of32)
NEW YORK, NY - MAY 15: Actress Lucy Liu attends the 2013 CBS Upfront at The Tent at Lincoln Center on May 15, 2013 in New York City. (Photo by Jim Spellman/WireImage) (credit:Getty Images)
CBS Upfront 2013(03 of32)
NEW YORK - MAY 15: Lucy Liu from Elementary on the way to red carpet at CBS's Upfront party at New York's Lincoln Center following the 2013 CBS Upfront presentation at Carnegie Hall on Wednesday, May 15, 2013. (Photo by Craig Blankenhorn/CBS via Getty Images) (credit:Getty Images)
The Talk(04 of32)
NEW YORK - MAY 15: Actress Lucy Liu ('Elementary') joins the ladies of The Talk on Wednesday, May 15, 2013 on the CBS Television Network. (Photo by Heather Wines/CBS via Getty Images) (credit:Getty Images)
Elementary(05 of32)
NEW YORK - APRIL 18: 'The Woman'-- As Sherlock (Jonny Lee Miller) reels at the reappearance of his former lover, Irene Adler, a series of flashbacks unravel the tumultuous events that led to his downfall into addiction. Also pictured is Lucy Liu, on the two hour season finale of ELEMENTARY, on Thursday, May 16 (10:00-11:00 p.m. ET/PT) on the CBS Television Network. (Photo by Jeffrey Neira/CBS via Getty Images) (credit:Getty Images)
Elementary(06 of32)
NEW YORK - APRIL 4: 'Dead Man's Switch'-- Sherlock (Jonny Lee Miller, near right) and Joan (Lucy Liu) hunt for the accomplice of a murdered blackmailer who had been targeting the families of rape victims threatening to release videos of the assault if they don’t pay. Also pictured is Ato Essandoh ( far right) on ELEMENTARY, on Thursday, April 25 (10:00-11:00 p.m. ET/PT) on the CBS Television Network. (Photo by Jojo Whilden/CBS via Getty Images) (credit:Getty Images)
Elementary(07 of32)
NEW YORK - FEBRUARY 14: 'Possibility Two' -- Sherlock tries to teach Joan (Lucy Liu) his deductive skills by sending her to a suspicious dry cleaning establishment, on ELEMENTARY, on a Thursday, Feb. 21 on the CBS Television Network. (Photo by Sonja Flemming/CBS via Getty Images) (credit:Getty Images)
On Location For "Elementary"(08 of32)
NEW YORK, NY - FEBRUARY 14: Lucy Liu filming on location for 'Elementary' on February 14, 2013 in New York City. (Photo by Bobby Bank/WireImage) (credit:Getty Images)
Elementary(09 of32)
NEW YORK - FEBRUARY 25: 'Deja Vu All Over Again' -- Joan (Lucy Liu) takes her first case without Sherlock (Jonny Lee Miller): the disappearance of a woman who left behind a tearful break-up video to her husband that mentioned a murder on a subway platform, on ELEMENTARY, on a Thursday, March 14 (10:00-11:00 p.m. ET/PT) on the CBS Television Network. (Photo by Jojo Whilden/CBS via Getty Images) (credit:Getty Images)
Late Night With Jimmy Fallon - Season 4(10 of32)
LATE NIGHT WITH JIMMY FALLON -- Episode 771 -- Pictured: Actress Lucy Liu during an interview on January 29, 2013 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images) (credit:Getty Images)
Late Night With Jimmy Fallon - Season 4(11 of32)
LATE NIGHT WITH JIMMY FALLON -- Episode 771 -- Pictured: (l-r) Actress Lucy Liu, Host Jimmy Fallon during a segment on January 29, 2013 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images) (credit:Getty Images)
70th Annual Golden Globe Awards - Arrivals(12 of32)
BEVERLY HILLS, CALIFORNIA - JANUARY 13: Actress Lucy Liu arrives at the 70th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by George Pimentel/WireImage) (credit:Getty Images)
70th Annual Golden Globe Awards - Arrivals(13 of32)
BEVERLY HILLS, CA - JANUARY 13: Lucy Liu arrives at the 70th Annual Golden Globe Awards at The Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by Steve Granitz/WireImage) (credit:Getty Images)
2013 Winter TCA Tour - Day 9(14 of32)
PASADENA, CA - JANUARY 12: Actress Lucy Liu of 'Elementary' speaks onstage during the CBS portion of the 2013 Winter TCA Tour at Langham Hotel on January 12, 2013 in Pasadena, California. (Photo by Frederick M. Brown/Getty Images) (credit:Getty Images)
2012 New York Women In Film And Television Muse Awards(15 of32)
NEW YORK, NY - DECEMBER 13: Actress Lucy Liu attends 2012 New York Women In Film And Television Muse Awards at New York Hilton – Grand Ballroom on December 13, 2012 in New York City. (Photo by Slaven Vlasic/Getty Images) (credit:Getty Images)
2012 New York Women In Film And Television Muse Awards(16 of32)
NEW YORK, NY - DECEMBER 13: Actress Lucy Liu attends 2012 New York Women In Film And Television Muse Awards at New York Hilton – Grand Ballroom on December 13, 2012 in New York City. (Photo by Slaven Vlasic/Getty Images) (credit:Getty Images)
Elementary(17 of32)
NEW YORK - DECEMBER 12: 'The Red Team' Watson (Lucy Liu) tries to broker peace between Sherlock and Gregson so that he can be reinstated as a police consultant, on ELEMENTARY, Thursday, Jan. 31 (10:00-11:00 PM, ET/PT) on the CBS Television Network. (Photo by Jojo Whilden/CBS via Getty Images) (credit:Getty Images)
2012 Women For Women International Gala(18 of32)
NEW YORK, NY - NOVEMBER 08: gayle King and Lucy Liu attends 2012 Women For Women International Gala at Koch Theater, Lincoln Center on November 8, 2012 in New York City. (Photo by Shahar Azran/WireImage) (credit:Getty Images)
2012 Women For Women International Gala(19 of32)
NEW YORK, NY - NOVEMBER 08: Actress Lucy Liu attends 2012 Women For Women International Gala at Koch Theater, Lincoln Center on November 8, 2012 in New York City. (Photo by Bennett Raglin/WireImage) (credit:Getty Images)
Celebrity Sightings In New York City - October 23, 2012(20 of32)
NEW YORK, NY - OCTOBER 23: Lucy Liu filming 'CBS-TV's 'Elementary' on the Streets of Manhattan on October 23, 2012 in New York City. (Photo by Aby Baker/Getty Images) (credit:Getty Images)
"Connecting The Dots" Book Launch & Exhibition Opening(21 of32)
NEW YORK, NY - OCTOBER 17: Lucy Liu attends 'Connecting The Dots' Book Launch & Exhibition Opening at Donna Karan's Urban Zen Center at the Stephen Weiss Studio on October 17, 2012 in New York City. (Photo by Dimitrios Kambouris/Getty Images) (credit:Getty Images)
Celebrities Visit "Late Show With David Letterman" - October 11, 2012(22 of32)
NEW YORK, NY - OCTOBER 11: Lucy Liu leaves 'The Late Show with David Letterman' at Ed Sullivan Theater on October 11, 2012 in New York City. (Photo by Donna Ward/Getty Images) (credit:Getty Images)
64th Primetime Emmy Awards - Arrivals(23 of32)
LOS ANGELES, CA - SEPTEMBER 23: Lucy Liu arrives at the 64th Primetime Emmy Awards at the Nokia Theatre L.A. Live on September 23, 2012 in Los Angeles, California. (Photo by Paul A. Hebert/Getty Images) (credit:Getty Images)
HBO'S Post 64th Primetime Emmy Awards Reception - Arrivals(24 of32)
LOS ANGELES, CA - SEPTEMBER 23: Lucy Liu arrives at HBO'S Post 64th Primetime Emmy Awards reception held at The Plaza at the Pacific Design Center on September 23, 2012 in Los Angeles, California. (Photo by Michael Tran/FilmMagic) (credit:Getty Images)
HBO's 64th Primetime Emmy Post Award Reception(25 of32)
LOS ANGELES, CA - SEPTEMBER 23: Actress Lucy Liu arrives at HBO's Official After Party at The Plaza at the Pacific Design Center on September 23, 2012 in Los Angeles, California. (Photo by Jason Merritt/WireImage) (credit:Getty Images)
2012 CBS, Showtime and The CW TCA Summer Party(26 of32)
BEVERLY HILLS, CA - JULY 29: Actress Lucy Liu and actor Jonny Lee Miller arrive at the 2012 CBS, Showtime and The CW TCA Summer Party at 9900 Wilshire Blvd on July 29, 2012 in Beverly Hills, California. (Photo by Jon Kopaloff/FilmMagic) (credit:Getty Images)
2012 TCA Summer Press Tour - CBS Photo Call(27 of32)
BEVERLY HILLS, CA - JULY 29: Actress Lucy Liu speaks at the 'Elementary' discussion panel during the CBS portion of the 2012 Summer Television Critics Association tour at the Beverly Hilton Hotel on July 29, 2012 in Los Angeles, California. (Photo by Mark Davis/WireImage) (credit:Getty Images)
Comic-Con International 2012 - Day 1(28 of32)
SAN DIEGO, CA - JULY 12: Lucy Liu arrives at the 'Beauty and the Beast' and 'Elementary' press line at Comic-Con International 2012 - Day 1 at San Diego Convention Center on July 12, 2012 in San Diego, California. (Photo by Joe Scarnici/FilmMagic) (credit:Getty Images)
The Critics' Choice Television Awards - Arrivals(29 of32)
BEVERLY HILLS, CA - JUNE 18: Lucy Liu arrives at the Critics' Choice Television Awards at The Beverly Hilton Hotel on June 18, 2012 in Beverly Hills, California. (Photo by Jerod Harris/WireImage) (credit:Getty Images)
CBS Upfront 2012(30 of32)
NEW YORK, NY - MAY 16: Actress Lucy Liu attends the CBS Upfront 2012 at The Tent at Lincoln Center on May 16, 2012 in New York City. (Photo by Jim Spellman/WireImage) (credit:Getty Images)
Premiere Of Tribeca Film's "Detachment" Hosted By American Express & The Cinema Society(31 of32)
NEW YORK, NY - MARCH 13: Actress Lucy Liu attends the premiere of Tribeca Film's 'Detachment' hosted by American Express & The Cinema Society at Landmark Sunshine Cinema on March 13, 2012 in New York City. (Photo by Charles Eshelman/FilmMagic) (credit:Getty Images)
2012 Film Independent Spirit Awards - Arrivals(32 of32)
SANTA MONICA, CA - FEBRUARY 25: Lucy Liu arrives at the 2012 Film Independent Spirit Awards at Santa Monica Pier on February 25, 2012 in Santa Monica, California. (Photo by Jeffrey Mayer/WireImage) (credit:Getty Images)