That's not really how it works. Eating a good diet (yes, including protein) and having a good exercise routine and executing both strictly for a number of years can lead to have a good natural body. That does not lead to having a body like Thor though.

Not to mention that makeup, specific lighting, timed pumps and short term dieting tricks can be used for movies. How an actor looks on the day of a shoot isn't how they walk around looking.