Half-on. Half-off.

Allison Williams shared a selfie on Instagram Friday after taking off just half of her makeup while on the set of HBO’s “Girls.” The snapshot showed the dramatic difference between the actress’ au naturel look and her character Marnie’s super-glam appearance.

Took half my makeup off. Guess why Marnie might have this insane look? #90sLips #Season5

A photo posted by Allison Williams (@aw) on May 1, 2015 at 12:25pm PDT

Williams also shared a Dubsmash of her lip-syncing to Nicki Minaj with all her makeup still on.

This is what happens between shots on set. #Minajesty #Monster #SoMuchMakeup

A video posted by Allison Williams (@aw) on Apr 29, 2015 at 6:39am PDT

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