Leo is a 2023 animated musical comedy film directed by Robert Marianetti, Robert Smigel and David Wachtenheim (in Marianetti and Wachtenheim's feature directorial debuts), written by Smigel, Adam Sandler, and Paul Sado, and produced by Sandler and Mireille Soria. The second animated feature from Sandler's production company Happy Madison Productions, coming 21 years after the first, Eight Crazy Nights (2002), it stars Sandler in the titular voice role, alongside Bill Burr, Cecily Strong, and Jason Alexander. The film tells the story of a tuatara longing for the wild and worried about dying who is taken home by different students per the assignment of a strict substitute teacher, but gets himself caught up in the troubles of each student and offers great advice to each of them.

Leo was released by Netflix on November 21, 2023, to generally positive reviews by critics, praised the animation, humor, vocal performances and musical numbers.