Greta Gerwig has had ensemble roles in movies like "Greenberg" and "No Strings Attached." But in her new film, Whit Stillman's "Damsels in Distress," Gerwig goes from quirky best friend to leading lady. She plays Violet, the head of a trio of prudent coeds who aims to help her fellow flailing students at fictional Seven Oaks College. Since landing on the Hollywood scene four years ago, Greta's made quite a style impact, too. Check out her fashion evolution!