John Krasinski says his character's limp in action flick 'Fountain of Youth' is real, after the actor's legs locked up while running for a train stunt, but the crew offered him a surprising solution.

John Krasinski and Natalie Portman were among the stars who attended the premiere of their movie "Fountain of Youth" on Monday. The film starts streaming Friday on Apple TV+.

John Krasinski revealed in a new interview that he is shown limping in one 'Fountain of Youth' action sequence because he really was limping due to dehydration. 'My legs locked up and I run like a tin man for a train,