Mary-Kate is Romper-Friendly

A satin romper-clad Mary-Kate Olsen (in Calvin Klein Collection) attends the after-party for the screening of 21 at NYC’s Mercer Kitchen on Wednesday.

Belt by Chanel, shoes by Christian Louboutin, Clutch from Miu Miu.

Other pictures include Kate Bosworth in Calvin Klein sans her Twenty8Twelve jacket. The 21 star mingled with producer Dana Brunetti and supermodels Helena Christensen and May Anderson.

15+ pictures inside of romper-friendly Mary-Kate…