Joseph Baena, 23, is totally channeling his dad in his new Instagram post! The muscular hunk posed in a black speedo that revealed his six-pack abs while hanging outside by a pool, in an eye-catching pic and video that made us reminisce about Arnold Schwarzenegger‘s younger days. He was all smiles and had a towel over one shoulder as he put his arms out for a second in the clip, which was posted on Aug. 18.