Mutt Williams, aka Henry Jones III is the son of Indiana Jones and Marion Ravenwood and the deuteragonist of the 2008 film Indiana Jones and the Kingdom of the Crystal Skull and a posthumous character in the 2023 film Indiana Jones and the Dial of Destiny.
He is a rebellious teen and is portrayed as a stereotypical 1950's greaser: greased hair, leather jacket, drives a motorcycle, etc. He accompanies Indiana Jones on a quest to rescue his mother and his friend Harold Oxley, and find the crystal skull.