Michael Angelo Bellisario is an American actor and the son of scriptwriter and producer Donald P. Bellisario. Bellisario has mostly had parts in series produced by his father, he played Midshipman Michael "Mikey" Roberts in JAG and also appeared during the first part of NCIS season 3 as Charles "Chip" Sterling. He has also appeared in four episodes of Quantum Leap. In the pilot chapter of JAG, Michael was the boy rowing in the Adriatic in the aperture scene. He was 15 at this time. At the end of S03E01, he makes a pizza delivery to a police station. Michael has two other siblings that are actors; half-sister Troian Bellisario (Spencer Hastings on Pretty Little Liars) and stepbrother Sean Murray (Timothy McGee on NCIS).