BooBoo Stewart: Shirtless Martial Arts!

BooBoo Stewart shows off his rock-hard abs while practicing his martial arts moves on Monday (July 9) in Los Angeles.

The 18-year-old shirtless heartthrob became a Martial Arts World Champion at the age of eight!

PHOTOS: Check out the latest pics of BooBoo Stewart

Later this year, BooBoo and his castmates will be hitting the red carpet for his highly anticipated vampire film, The Twilight Saga: Breaking Dawn � Part 2.

In case you missed it, check out the trailer which stars Kristen Stewart, Robert Pattinson, and Taylor Lautner.