At age 6, Megna made his acting debut in Frank Loesser's Broadway musical Greenwillow.

[2] At 7, he starred in All the Way Home,[2] an adaptation of James Agee's novel about the effect of a father's death on his family.

The character was based on writer Truman Capote, a childhood friend and later associate of Harper Lee, the author of the original novel.

[citation needed] Megna appeared in many television programs throughout the 1960s and 1970s; he portrayed a near-blind child in the Naked City episode "A Horse Has a Big Head - Let Him Worry!

He also acted in two films starring Burt Reynolds and directed by Hal Needham: Smokey and the Bandit II (1980) and The Cannonball Run (1981).