When it comes to losing weight for a role, these actors have no fear. Welcome to WatchMojo, and today were looking at actors who took a role so seriously that they lost a whole bunch of weight - often, what appeared to be a dangerous amount. Our countdown of actors who lost a dangerous amount of weight for a role includes Cillian Murphy, Christian Bale, Matthew McConaughey, and more! Which of these weight loss transformations struck you the most? Let us know in the comments.

Watch more great acting videos here:
Top 20 Improvised Movie Moments: https://youtu.be/cigQW8y9bHE
Top 20 Greatest Acting Debuts in Movies: https://youtu.be/-wcNYJ3U-cU
Top 10 Best Voice Acting Performances in 2000s Movies: https://youtu.be/ws6Q8nI2bxE?siW_1won9lUqSt1zmp

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