Article continues below advertisementArnold Schwarzenegger's mini-me son Joseph Baena looked quite content over the weekend following his win at his first bodybuilding competition.The 28-year-old fitness fanatic put his toned physique on display while taking a stroll in Los Angeles on March 30.Article continues below advertisementSource: Thecelebrityfinder/MEGAJoseph Baena is the son of Arnold Schwarzenegger and his former housekeeper Mildred Baena.