Cast
Dwayne Johnson as Spencer Gilpin: An intelligent, but unconfident and neurotic high school student. In Jumanji, he is transformed into Dr. Xander "Smolder" Bravestone, a strong, confident archaeologist and explorer who has no weaknesses.
Alex Wolff as Spencer in the real world
Kevin Hart as Anthony "Fridge" Johnson: A high school football player whose friendship with Spencer has deteriorated due to their different social statuses. In Jumanji, he is transformed into Franklin "Mouse" Finbar, a diminutive zoologist and weapons carrier whose weaknesses include strength, speed, and cake.
Ser'Darius Blain as Fridge in the real world
Jack Black as Bethany Walker: A popular and vain high school student. In Jumanji, she is transformed into Professor Sheldon "Shelly" Oberon, an overweight male expert in many scientific fields such as cartography, archaeology, palaeontology, and cryptography who has a weakness to endurance.
Madison Iseman as Bethany in the real world
Karen Gillan as Martha Kaply: A quiet and shy high school student with a cynical intellect. In Jumanji, she is transformed into Ruby Roundhouse, an explorer and martial arts expert, including capoeira; and has a weakness to venom.
Morgan Turner as Martha in the real world
Rhys Darby as Nigel Billingsley: An NPC in Jumanji who serves as the primary guide for its players
Bobby Cannavale as Russell Van Pelt, a corrupt archaeologist and former partner of Bravestone's. He is a reimagined version of the Van Pelt character from the original film. He is credited as Russell Van Pelt in the American version of the film, and John Hardin Van Pelt in the British version of the film.
Nick Jonas as Alex Vreeke: A teenager who has been trapped in Jumanji since 1996. In the game, he is transformed into Jefferson "Seaplane" McDonough, an aircraft pilot with a weakness to mosquitoes.
Mason Guccione as teenage Alex and Colin Hanks as adult Alex in the real world. Hanks was uncredited for his role.
Additionally, Marin Hinkle, Tracey Bonner, and Natasha Charles Packer play the mothers of Spencer, Fridge, and Bethany respectively. Appearing as staff members of Brantford High School are Marc Evan Jackson as Principal Bentley, Carlease Burke as history teacher Miss Mathers, Missi Pyle as gym teacher Coach Webb, and Maribeth Monroe as Bethany's English teacher. Kat Altman portrays Bethany's friend Lucinda and Michael Shacket portrays Spencer's friend Fussfeld. Alex's father is played by Sean Buxton in 1996 and an uncredited Tim Matheson in the present day. In Jumanji, William Tokarsky and Rohan Chand appear as a food vendor and a boy, respectively, in the marketplace.
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