Sienna Miller may have a bare wedding ring finger, but her visible baby bump at the Solve Sundsbo Fashion Week event on Tuesday was enough to confirm the pregnancy rumors.

The actress is reportedly expecting her first child from her boyfriend Tom Sturridge, although neither party has confirmed the rumors.

On Valentine's Day, Miller stepped out onto the red carpet of the Solve Sundsbo event in New York, where she was donning a figure hugging black dress that exposed her baby bump to the fore.

The 30-year-old looked stunning with her pregnancy glow. Her floor-length fitted dress boasted a demure slit up to her knees and was complimented by chunky accessories, including a bronze-gold clutch bag.

On jan.30, Miller's sister Savannah told Vogue that Sienna and her boyfriend were expecting their first child and that their family was thrilled.

Engagement? 

Miller was spotted in London last Friday, wearing a diamond ring on her wedding finger, which spurred rumors of an engagement to her boyfriend, but the ring was absent on Tuesday as she arrived in New York solo. Again neither Miller nor Sturridge confirmed the status of their relationship.

An source close to the couple told US Weekly that the couple speak openly about the pregnancy but do not have plans to get married straight away, if at all.