Gaffigan was announced to provide the voice of Thunderbolt in season two of Stargirl. By season three, the role recast to Seth Green. In January 2021, he joined the cast of Disney's Peter Pan & Wendy as Mr. Smee. In 2021, Gaffigan voiced Lorenzo Paguro in the Pixar film Luca. Animation Gaffigan is also notable for his voice-over work. He voiced an animated version of himself on Pale Force with Conan O'Brien from 2005 to 2008. He has also voiced characters on the animated shows Bob's Burgers, Shorty McShorts' Shorts, WordGirl, Star vs. the Forces of Evil, and the animated feature Duck Duck Goose. Writing Gaffigan produced a series of animated shorts for Late Night with Conan O'Brien, titled Pale Force (2005–2008). The animated sketches featured Gaffigan and O'Brien as superheroes who fight crime with their extremely pale skin. The series was nominated for a Daytime Emmy in 2007 in the category of "Outstanding Broadband Program – Comedy". Gaffigan's humorous quips have earned him over two and a half million followers on Twitter. He was listed by Rolling Stone as one of the "25 funniest people on Twitter" in 2012. In 2013, Gaffigan released Dad Is Fat, a title derived from the first complete sentence his eldest son wrote on a dry-erase board at the age of four or five. "He showed it to me," Gaffigan recalled in an interview, "and I laughed, and then I put him up for adoption." The book is a collection of essays dealing with the raising of his children, as well as reminiscences from his own childhood. In support of the volume, he appeared on NPR's Weekend Edition, ABC's The View, and MSNBC's Morning Joe, spoke at BEA in New York, embarked on a nine-stop bus tour that ended on Father's Day. It debuted at number five on The New York Times Best Seller's list, remaining on the list for three months. The book received tepid reviews from critics. Kirkus Reviews said of the book that it's "hardly groundbreaking comedy material, but the book will appeal to Gaffigan's fans". Lou Harry of the Indianapolis Business Journal said that while "no new ground is broken in Jim Gaffigan's book...'Dad is Fat' should be a fun intermezzo in your summer reading pile." Regarding the audiobook, which Gaffigan read, Audiofile said his "performance strikes the right balance between his near-deadpan comedy delivery and the energy needed to