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Patrick Schwarzenegger

Twitter

Looks like Patrick Schwarzenegger inherited Arnold's love for getting buff!

The 19-year-old model, actor and USC student showed off his chiseled physique on Twitter Friday.

"Early morning pump!" he captioned the in-the-gym shot, in which he is clearly flexing. "Who is getting into shape for summer??!! Gonna gain 7 pounds this summer."

Presumably, young Schwarzenegger means seven pounds of muscle (body fat isn't even in that kid's vocab).

And as much as we'd all like for Patrick to be shirtless forever, he's actually a cofounder of Project 360, a clothing company seeking to raise funds and organize donations for important causes.

Guess if he has to wear clothes, they might as well have a good message behind them!

PHOTOS: Take a look back at Arnold's biggest movie roles!