Shirtless Robert Pattinson Makes Waves While Paddleboarding in Malibu

Breaking Dawn hunk is all smiles while getting in some cardio in the Pacific Ocean

Robert Pattinson stays afloat with a smile.

The 25-year-old Breaking Dawn star went paddleboarding Friday in Malibu. Wearing only black swim trunks, the shirtless hunk grinned broadly as he paddled through the Pacific.

So why was R.Pattz sweating in the sea?

We're not exactly sure. But whether it was for an upcoming role or just for fun, paddleboarding is great exercise.

And Kristen Stewart—along with Pattinson's legions of Twilight fans—undoubtedly appreciates his commitment to fitness.