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Whether she's dressed up for a meeting, or dressed down for the gym, Ashley Greene manages to look absolutely gorgeous at every angle!

The Twilight star showed off her slender frame in a red sweater, dark skinny jeans and high heels while on her way to a meeting in Beverly Hills, but later changed into casual gym clothes for a workout in Studio City, on Thursday afternoon.

Much like her charter in Pan Am, Greene's upcoming film, Butter, features a very steamy girl-on-girl make out sesh ... with Olivia Wilde!

Ash told Lucky mag of the kiss, "It wasn't that awkward. It's the same idea as having to kiss a male co-star and it's not real. Olivia is such a cool chick and very professional. So we were just messing around and cracking up in between scenes ... And now I'm the envy of every straight male everywhere!"