Zac Efron's muscles are almost as famous as he is but this weekend the actor flexed for a good cause. Well, flexing for our own entertainment is good, but trust us this is way better.
Efron competed in the Nautica Malibu Triathalon with his brother Dylan for the second year in a row.
The "Baywatch' star competed to raise money for Children's Hospital LA and their pediatric cancer research program.
See? We told ya this was a really good cause!