Lanny Onasis (portrayed by Christian Copelin) was Matt's best friend from the show Lizzie McGuire.
He never spoke on-screen, but Matt seemed to have no problem communicating with him. He was a direct descendant of Crispus Attucks. In the episode, "Movin' On Up," Matt and Lanny try out for cheerleading, but don't take the position on the squad because there's only room for one of them and they don't want to split up.
Characters: Lizzie McGuire | Miranda Sanchez | David Gordon | Matt McGuire | Jo McGuire | Sam McGuire | Kate Sanders | Ethan Craft | Larry Tudgeman | Claire Miller | Lanny Onasis | Melina Bianco | Parker Mackenzie | Danny Kessler | Veruca Albano | Angel Lieberman | Amy Sanders | Paolo Valisari | Isabella Parigi