Jayne was born in Flushing, New York City, on April 10, 1969. He is of Jewish descent. At the age of three, he was visiting his older half-brother Scott Jacoby on the set of That Certain Summer, for which Scott won an Emmy for Best Supporting Actor. The Director needed someone to play Jacoby in flashbacks, and Jayne was selected and began his career.
Jayne was one of a child actor from the mid to late 1980s, starring in numerous guest appearances on TV shows such as Trapper John, M.D., The Golden Girls, as Blanche's 14-year-old rebellious grandson, The A-Team, 21 Jump Street. He is also known for the role as Buddy, the brother of Terri in Just One of the Guys from 1985.
Jayne is best known for his role in the teen show Parker Lewis Can't Lose, starring alongside actor Corin Nemec. The show ran from 1990 until 1993. After the show ended, he had smaller roles in shows such as Renegade, Murder One (1995), Walker, Texas Ranger (1996), Charmed (1999), Cold Case in 2009.
