"The Hamptons Film Festival "The Girl" Premiere: Sienna Miller

Sienna Miller made her first appearance after giving birth a baby girl a few months ago. I swear these celebrities must get a tummy tuck, right after giving birth!

The actress looked amazing in her chic ivory silk crepe Alessandra Rich Spring 2012 dress adorned with a fabulous cape.

She finished off her look with straight hair, gold cuffs, and a red lip-shaped bag.