By Maane Khatchatourian
July 09, 2012 at 06:47 PM EDT

Sienna Miller gave birth to a baby girl this weekend in London, People reports.

This is the first child for the actress, 30, and her actor boyfriend Tom Sturridge, 26.

Aside from a brief comment to Vogue U.K. in April, Miller has kept quiet about the pregnancy. “It’s all progressing nicely, and it’s very exciting,” she told Vogue.

Miller’s upcoming film projects include 2013’s A Case of You and Alfred Hitchcock and the Making of the Birds.

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