Cera had five film releases in 2017, the first of which was the animated superhero comedy "The Lego Batman Movie", which featured Cera as the voice of the Batman's sidekick Robin. He then played a supporting role as a sleazy car salesman in the comedy "How to Be a Latin Lover" and co-starred in the comedy-drama "Lemon" as an actor with a "wedge of hair that makes him look like Frédéric Chopin crossed with "Eraserhead"", as described by "Variety" critic Owen Gleiberman. Cera starred opposite Abbi Jacobson in the drama "Person to Person", focusing on the struggles of different people over the course of one day in New York City and featured Cera and Jacobson as a pair of crime reporters investigating a possible murder. In his final film of the year, Aaron Sorkin's crime drama "Molly's Game", Cera played a celebrity known only as Player X who participates in a high-stakes underground poker empire run by Molly Bloom (played by Jessica Chastain). Cera's fictional character in the film was a composite character of real-life celebrity poker players Leonardo DiCaprio, Tobey Maguire and Ben Affleck.