Pregnant Sienna Miller's baby bump makes debut

Sienna Miller's form-fitting black dress confirmed Tuesday (Feb. 14) night what she and boyfriend Tom Sturridge have yet to: She's pregnant.

Of course, we already knew that, but it's always good to have a baby bump confirmation.

The 30-year-old actress, whose last film credit according to IMDB was 2009's "G.I. Joe: The Rise of Cobra," stepped out Tuesday sporting a baby belly at a fashion video exhibit in New York City. According to People, boyfriend (and Robert Pattinson BFF) Sturridge wasn't in attendance with the first-time mom-to-be, despite the event being held on Valentine's Day.

There was also no sign of the diamond ring Miller was photographed sporting in London last week, which had prompted rumors of an engagement.