Klaus is a 2019 animated Christmas adventure comedy film co-written, co-produced, and directed by Sergio Pablos in his directorial debut, produced by his company The SPA Studios and distributed by Netflix. Co-written by Zach Lewis and Jim Mahoney, and co-directed by Carlos Martinez Lopez, the traditionally animated film stars the voices of Jason Schwartzman, J. K. Simmons, Rashida Jones, Will Sasso, Neda Margrethe Labba, Sergio Pablos (in a dual role), Norm Macdonald (in his final film role released in his lifetime), and Joan Cusack. Serving as an alternate origin story of Santa Claus independent from the historical Saint Nicholas of Myra and using a fictional 19th-century setting, the plot revolves around a postman stationed in an island town to the Far North who befriends a reclusive toymaker (Klaus).

Klaus was released on 8 November 2019 and received critical acclaim for its animation, story, emotional depth, humor, narrative, and vocal performances. It won seven awards at the 47th Annie Awards, including Best Animated Feature, and also won Best Animated Film at the 73rd British Academy Film Awards. The film was also nominated at the 92nd Academy Awards for Best Animated Feature, making it the first animated film from Netflix to be nominated for an Academy Award, as well as the first animated film released by a streaming service to be nominated, alongside I Lost My Body (also Netflix), Klaus lost to Toy Story 4, which also starred Joan Cusack who was reprising her role as Jessie from Toy Story 2 and Toy Story 3. Simmons would later portray Santa Claus in the 2024 live-action film Red One.