PatrickSchwarzeneggerActingShirtless230.jpgPatrick Schwarzenegger just celebrated his 18th birthday, and now that he's an adult, the model son (literally) of Arnold Schwarzenegger and Maria Shriver is spilling the beans on his career aspirations.

The teen tells WWD that, though he's applying to colleges (including USC, Penn, Georgetown and Stanford), he has plans to follow in his actor dad's footsteps.

Patrick has already started modeling -- including posing on a much-talked-about billboard in LA for Hudson Jeans. He says:

    "I’ve wanted to do some sort of acting stuff down the line, but modeling is a good way to get comfortable in front of the camera."

How do his parents feel about the idea of acting? "They support anything I do and I support anything they do," he says.