Leabu made his debut playing the part of Jason White, Lois Lane's son, in the 2006 film Superman Returns. For this performance he won a 2007 Young Artist Award for Best Performance in a Feature Film – Supporting Young Actor and was nominated for Best Performance by a Younger Actor at the 2007 Saturn Awards.
Leabu made his debut acting as Jason White, Lois Lane's son, in the 2006 film Superman Returns. This role earned him recognition with a Young Artist Award and a Saturn Award nomination.