Sienna Miller, 30, gave birth to her first child with fiance Tom Sturridge, 26, over the weekend in London, Us Weekly reports.

The pair have been dating for more than a year, and announced the pregnancy in January. In February, Miller began sporting a diamond engagement ring.

Details on the baby's gender, name and weight have not yet been reported.

Miller briefly discussed her pregnancy with Vogue U.K. in the magazine's March issue. "I'm in my second trimester, so I'm I-can-talk-about-it pregnant," she said. "Even though I'm under strict instructions not to say anything as it would completely defeat the point of everything I've tried to achieve in the last eight years."

More stars who are expecting babies in 2012:

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  • Kendra Wilkinson

    The reality star is pregnant with her second child, a baby girl.

  • Melissa Rycroft

    The "Bachelor" star is expecting her second child with husband Tye Strickland.

  • Olivia Wilde

    Wilde is expecting her first baby with fiance Jason Sudeikis.

  • Drew Barrymore

    Barrymore is expecting her second child with husband Will Kopelman.

  • Kelly Clarkson

    Clarkson announced her pregnancy on Twitter Nov. 19, 2013. She's expecting her first child with husband Brandon Blackstock.

  • Ginnifer Goodwin

    Goodwin and her fiance and "Once Upon A Time" co-star Josh Dallas are expecting their first child together.

  • Jenni "JWoww" Farley

    JWoww, who's expecting her first child with fiance Roger Mathews in July, is set to welcome a little baby girl.

  • Kenan Thompson And Wife

    The "SNL" star and his wife Christina Evangelina are set to welcome their first child.

  • Lil Kim

    Lil Kim debuted her baby bump during NYFW on Feb. 12.

  • Christina Aguilera

    Aguilera is reportedly expecting her second child, her first with fiance Matthew Rutler.

  • Jenna Fischer

    The former "Office" star is expecting her second child.

  • Scarlett Johansson

    The actress is reportedly expecting her first baby with fiance, Romain Dauriac.

  • Mila Kunis

    Kunis is reportedly expecting her first child with fiance Ashton Kutcher.

  • Stacy Keibler

    Keibler is expecting her first child with new husband Jared Pobre.

  • Siri Pinter

    Carson Daly and longtime love Siri Pinter are expecting their third child.

  • Snooki

    Snooki is expecting her second baby with fiance Jionni LaValle.