Matthew McConaughey
Matthew McConaughey is one of the most charming actors in Hollywood, but he has also shown his dedication to his craft by changing his body for different roles. He dropped nearly 50 pounds to play an AIDS patient in the movie Dallas Buyers Club, which earned him an Oscar for Best Actor in 2014. He said he ate only egg whites, chicken, fish, and tapioca pudding for months to lose the weight. He also gained 47 pounds to play a muscular superhero in Batman Begins.
