Tom Cruise, Charlize Theron, 'The Avengers' and more
Winner: Charlize Theron
This was a summer to remember for the 37-year-old Oscar winner. Before 2012, Theron hadn't starred in a real hit since 2008's "Hancock" alongside Will Smith. Last winter's "Young Adult" may have garnered the actress strong reviews, but it was a bomb at the box office. Oh how times have changed, Theron had two back-to-back hits in June with Ridley Scott's "Prometheus" ($351 million worldwide) and "Snow White and the Huntsman" ($394 million worldwide). It's unlikely Theron will return for the expected sequels, but she'll happily take being back on the A-list instead.