Credit: Michael Buckner/Getty
Updated: Sunday Jun 30, 2013 | 09:40 AM EDT
More from PEOPLE
See More News
2 of 10
The model-actor, 20, with big biceps like dad Arnold's, also has a big heart: In 2009, he cofounded an apparel company that donates a portion of its proceeds to charity.
Copyright © 2014 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.
In partnership with AOL