Dexter's Laboratory: Ego Trip is a 1999 animated television film produced by Hanna-Barbera Cartoons and originally aired on December 10, 1999, on Cartoon Network. It is based on the Cartoon Network's animated television series Dexter's Laboratory. The special follows Dexter, the series' protagonist, as he travels forward through time and meets futuristic versions of himself and his rival Mandark.

While made for television, the film is the directorial debut of series creator Genndy Tartakovsky and was originally intended to conclude the series. Ego Trip was the first Cartoon Network television movie produced, and is the final Dexter's Laboratory installment to be animated using traditional cel animation. This is one of the final times Christine Cavanaugh reprises her role as Dexter; Candi Milo would replace her beginning in the third season.