Maronna played older Pete Wrigley in the television show The Adventures of Pete & Pete on Nickelodeon, as well as the character of Jeff McCallister in the movie Home Alone and its sequel, Home Alone 2: Lost in New York. He also portrayed a teenage killer in an episode of Law & Order. In the 2000s, Maronna appeared in the movies Slackers and 40 Days and 40 Nights.