Leo is a 2023 American 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 which came 21 years after Eight Crazy Nights (2002), it stars the voices of Sandler, Bill Burr, Cecily Strong, and Jason Alexander with supporting voice roles provided by Sadie Sandler, Sunny Sandler, Rob Schneider, Jo Koy, Allison Strong, Jackie Sandler, Heidi Gardner, Robert Smigel, and Nick Swardson. 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 life advice to each of them.

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