[2] Born in Fordstown Crossroads, County Meath, Ireland,[1] he and his brothers, Tom, Owen, and Joe, and a sister Mary Moore emigrated to the United States as steerage passengers on board the S.S. Anchoria and were inspected on Ellis Island in May 1896.

Moore played the role as Hector MacDonald in the MGM crime/drama The Unholy Three (1925) co-starring Lon Chaney and Mae Busch, which was a huge hit that year.

He played the role as Stanley "Stan" Wentworth in Coquette (1929) opposite Mary Pickford and Johnny Mack Brown.

As time passed, Moore took smaller character roles and remained active in the motion picture industry.

His final appearance was in the uncredited role as Charlie Bates in the horror/thriller I Bury the Living (1958), which starred Richard Boone and Theodore Bikel.