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Joseph Baena posts childhood photo with Arnold Schwarzenegger on his dad's 73rd birthday
The shot is from the classic documentary movie Pumping Iron, which first introduced Schwarzenegger to the world as a young body builder.“Wishing the Happiest Birthday to my Dad! You are and will always be 'Número Uno',” Baena captioned.View this post on InstagramJoseph is the son Schwarzenegger had with his former housekeeper Mildred Baena, an affair which ended the Terminator star's marriage to Maria Shriver.However, he now appears on better terms with his ex-wife, judging by a picture posted of his birthday celebrations.View this post on InstagramHe's pictured with Shriver, three cakes and their four children Christina, 29, Christopher, 22, and Katherine, 30, who is married to Chris Pratt, and 26-year-old Patrick, who posted the snap to