(HUFFINGTONPOST) — Mel Gibson showed some major muscles in California last week, proving that age is nothing but a number.

The actor’s ripped physique was on full display in a tight tank top when he was spotted leaving a gym in Los Angeles on Friday, Aug. 16. TMZ was the first to point out Gibson’s newly beefed-up arms, a decidedly different look for the typically slender 57-year-old.

A new movie role might be the reason behind Gibson’s buff bod.

On Monday, it was announced Gibson had joined the cast of “Expendables 3″ with Harrison Ford, E! News reported. The two Hollywood honchos will join originals Sylvester Stallone (Barney Ross) and Jason Statham (Lee Christmas) for the third installment of the action flick.

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