Billy Barty: Billy Barty. Actor: Masters of the Universe. Billy Barty was born William John Bertanzetti on October 25, 1924 in Millsboro, Pennsylvania. He began performing at age three and began making pictures in 1927. He played Mickey Rooney's little brother in the "Mickey McGuire" comedy shorts series. He was equally adept in both comedy and drama, and generally gives an added zest to any production he is associated with. He founded...
