One of only three actors who has played the son of another actor, then gone on to play a younger version of that same actor's character. The others are Bruno Kirby, who played the son of Richard S. Castellano in 'The Super (1973)(TV)', and then the young Clemenza in The Godfather: Part II (1974); and River Phoenix, who played Harrison Ford's son in The Mosquito Coast (1986), and the young Indy in Indiana Jones and the Last Crusade (1989).
Appeared with Mel Gibson twice in 2000, once as his character's son in The Patriot (2000) and once as the younger version of his own character in What Women Want (2000).
The "Jack & Bobby" (2004) theme music is from The Patriot (2000), composed by John Williams. Lerman also starred in The Patriot (2000); it was his first movie role as Mel Gibson's youngest son.
Is best friends with Dean Collins. The two met on set of "Jack & Bobby" (2004) and make short films in their free time.