High Quality Content by WIKIPEDIA articles! Sage Moonblood Stallone (born May 5, 1976) is an American actor, director, producer and writer. He is the son of actor Sylvester Stallone. He is the brother of Seargeoh Stallone, and half-brother of Sistine, Sophia and Scarlet Stallone. His uncle is actor/singer Frank Stallone and grandmother is Jackie Stallone. He made his acting debut alongside his father in the fifth installment of the Rocky franchise titled Rocky V (1990) where he played Robert Balboa, Jr., the on-screen son of his father's title character. He also appeared with his father in the 1996 disaster movie Daylight. Since then he has only acted in low-budget exploitation films.