Matthew McConaughey turns 44 on Monday. A potential Oscar nominee for his lauded turn as a homophobic party boy who contracts HIV in "Dallas Buyers Club," McConaughey is having a banner year.
Part of that attention comes as a result of the many headlines he generated for losing 47 pounds to take on the role -- fodder for both gossip bloggers and Academy Award voters. The process prompted him to seek advice from Tom Hanks, who knows something about extreme weight fluctuations for movies.
Here are some actors who've dropped serious pounds for roles.