Sienna Miller and fiance Tom Sturridge, star of The Boat That Rocked, have reportedly welcomed their first child into the world this weekend in London, according to a report in Us Weekly.
The English actress, famous for her roles in Alfie, Layer Cake, G.I Joe and Factory Girl, is notoriously private, so it’s no surprise that at the moment the sex or name of the baby are unknown.
Ms Miller’s previous engagement, to Alfie co-star Jude Law, ended in 2005.
Her relationship with 26-year-old Sturridge began just over a year ago.
Ms Miller hasn’t spoken very much publicly about her pregnancy, but did touch on the subject briefly in an interview with Vogue UK in April.
She told the fashion magazine: “I'm feeling fine. It's all progressing nicely and it's very exciting."
The fiercely private star has also given her baby bump a few public outings this year, including to Restaurant Gordon Ramsay in London with Sturridge, for his pal Robert Pattinson’s birthday slap-up, according to Us Weekly.
Besides acting and preparing for motherhood, Miller, recently, has also been taking a stand against the press. She was one of the celebrities who appeared at the Leveson inquiry and described her horror at being chased by paparazzi.
It’s thought she will receive a large payment from News International after The News Of The World admitted hacking into her phone.
More stars who are expecting babies in 2012:
Monica is expecting her first child with husband Shannon Brown, but she's already mom to sons Rocko, who turns 8 later this month, and Romelo Montez, 5.
Jamie Dornan & Amelia Warner
The "Fifty Shades of Grey" star is expecting his first child with wife, Warner.
Winslet and her husband Ned Rocknroll are expecting their first child together.
The celebrity stylist is expecting her second child with husband Roger Berman in December.
Stefani is expecting her third child with Gavin Rossdale.
The "Arrow" star and his wife Cassandra Jean are expecting their first child together.
Kevin Jonas and his wife are expecting their first child.
Jason Biggs & Jenny Mollen
The "American Pie" star and his wife of five years are expecting their first child.
The actress is expecting her first child with fiance Mark Webber.
The actress is expecting her first baby with boyfriend Jean-David Blanc.
James & Kimberly Van Der Beek
The pair is <a href="Van Der Beek &" target="_blank">expecting their third child</a> this winter.
Blunt is <a href="http://www.huffingtonpost.com/2013/09/11/emily-blunt-john-krasinski-pregnant_n_3906064.html?utm_hp_ref=celebrity" target="_blank">expecting her first child </a>with husband John Krasinkski.
The "Bachelor" star is expecting her second child with husband Tye Strickland.
Wilde is expecting her first baby with fiance Jason Sudeikis.
Barrymore is expecting her second child with husband Will Kopelman.
Clarkson announced her pregnancy on Twitter Nov. 19, 2013. She's expecting her first child with husband Brandon Blackstock.
Goodwin and her fiance and "Once Upon A Time" co-star Josh Dallas are expecting their first child together.
Pataky and her husband Chris Hemsworth are expecting their second child, they announced Nov. 20, 2013.