After taking time away from the red carpet to have her first child, Sienna Miller made a return on Saturday evening while attending ‘The Girl’ screening, during the 20th Hamptons Film Festival at United Artists Regal Cinema in East Hampton, New York.

The British actress wore a sensational Alessandra Rich Spring 2012 dress.

Her off-white silk dress with draped, open sleeves, which give the look a cape-like effect, was styled with a charming red lips shoulder bag, carried as a clutch, and gold Freyja bangles by FoundCollected on both wrists.

On the model, the dress is styled with a black buckle belt, but I think Sienna’s styling is perfect for her post-baby figure.

Matching Prada pumps completed her look.

Which way works better for you? Belt or no belt?

Credit: AlessandraRich.com & Getty