<Ul> <Li> Dwayne Johnson as Dr. Smolder Bravestone , an Indiana Jones - like archaeologist and explorer who is Spencer 's avatar ; he is the leader of his team . <Ul> <Li> Alex Wolff as Spencer Gilpin , a nerdy gamer at Brantford High School . Panphobic ; his experience as Smolder Bravestone helps him cope with his anxiety and develop assertiveness . </Li> </Ul> </Li> <Li> Jack Black as Professor Sheldon `` Shelly '' Oberon , a cartographer , cryptographer , archaeologist , and paleontologist who is Bethany 's male avatar . <Ul> <Li> Madison Iseman as Bethany Walker , a pretty , popular , self - centered teenage girl at Brantford High School . </Li> </Ul> </Li> <Li> Kevin Hart as Franklin `` Mouse '' Finbar , a zoologist and weapons specialist who is Fridge 's avatar . <Ul> <Li> Ser'Darius Blain as Anthony `` Fridge '' Johnson , a Brantford High School football jock coasting on his athletic prowess who cares more about dating than studying . </Li> </Ul> </Li> <Li> Karen Gillan as Ruby Roundhouse , a Lara Croft - like martial artist , and dance fighter who is Martha 's avatar . <Ul> <Li> Morgan Turner as Martha Kaply , a shy and cynical intellectual at Brantford High School who believes that physical education is needless and who dislikes popular peers like Bethany and Fridge . </Li> </Ul> </Li> <Li> Nick Jonas as Jefferson `` Seaplane '' McDonough , a young aircraft pilot in Jumanji who is Alex Vreeke 's avatar . <Ul> <Li> Mason Guccione as Alex Vreeke , a teenage gamer who was trapped inside the Jumanji video game for two decades . </Li> <Li> Colin Hanks plays the adult Alex when he appears two decades later . </Li> </Ul> </Li> </Ul>
<Ul> <Li> Dwayne Johnson as Dr. Smolder Bravestone , an Indiana Jones - like archaeologist and explorer who is Spencer 's avatar ; he is the leader of his team . <Ul> <Li> Alex Wolff as Spencer Gilpin , a nerdy gamer at Brantford High School . Panphobic ; his experience as Smolder Bravestone helps him cope with his anxiety and develop assertiveness . </Li> </Ul> </Li> <Li> Jack Black as Professor Sheldon `` Shelly '' Oberon , a cartographer , cryptographer , archaeologist , and paleontologist who is Bethany 's male avatar . <Ul> <Li> Madison Iseman as Bethany Walker , a pretty , popular , self - centered teenage girl at Brantford High School . </Li> </Ul> </Li> <Li> Kevin Hart as Franklin `` Mouse '' Finbar , a zoologist and weapons specialist who is Fridge 's avatar . <Ul> <Li> Ser'Darius Blain as Anthony `` Fridge '' Johnson , a Brantford High School football jock coasting on his athletic prowess who cares more about dating than studying . </Li> </Ul> </Li> <Li> Karen Gillan as Ruby Roundhouse , a Lara Croft - like martial artist , and dance fighter who is Martha 's avatar . <Ul> <Li> Morgan Turner as Martha Kaply , a shy and cynical intellectual at Brantford High School who believes that physical education is needless and who dislikes popular peers like Bethany and Fridge . </Li> </Ul> </Li> <Li> Nick Jonas as Jefferson `` Seaplane '' McDonough , a young aircraft pilot in Jumanji who is Alex Vreeke 's avatar . <Ul> <Li> Mason Guccione as Alex Vreeke , a teenage gamer who was trapped inside the Jumanji video game for two decades . </Li> <Li> Colin Hanks plays the adult Alex when he appears two decades later . </Li> </Ul> </Li> </Ul>
who plays the grown up alex in jumanji
who plays the grown up alex in jumanji
Colin Hanks
Colin Hanks