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It’s clear that High School Musical heartthrob, Zac Efron, has bulked up recently for his most mature role in the film The Life and Death of Charlie St. Cloud.

In these scenes on set, the actor pretends to fly a miniature, radio-controlled plane on the lake in Vancouver, British Columbia.

The star was spotted snacking in between takes, most likely getting his protein fix to maintain his muscular physique. With his trademark floppy haircut long gone, the star is almost unrecognizable as a young Disney Channel star.

Gallery Info: Zac Efron films scenes for his film, The Life and Death of Charlie St. Cloud, in Vancouver.