Joseph Baena truly is his father’s mini-me! The 22-year-old lookalike son of Arnold Schwarzenegger has posed for a series of snaps in the gym, and bore a striking resemblance to his muscular dad. “When the squad rolls up to the gym!” he captioned the September 3 carousel post on Instagram. The first shot showed Joseph, and two of his mates, flexing their muscles while shirtless in the training facility.