Actor Jason Momoa was involved in a head-on crash involving a motorcyclist on a Los Angeles-area highway over the weekend, according to the California Highway Patrol.

The "Aquaman" and "Game of Thrones" actor was driving along Old Topanga Road in Calabasas, California, just before 11 a.m. on Sunday when a 21-year-old man on a motorcycle crossed the center line and smashed head-on into his 1970 Oldsmobile.

California Highway Patrol said the motorcyclist hit the left front side of Momoa's car and was ejected from the motorcycle.

Actor Jason Momoa with Lisa Bonet at a movie premiere

Jason Momoa and Lisa Bonet attend the World Premiere of Apple TV+'s "See" at Fox Village Theater on October 21, 2019 in Los Angeles, California. (Rodin Eckenroth/FilmMagic)

Momoa, 42, got out of his car to help the motorcyclist and flagged down passing driver to call 9-1-1. California Highway Patrol said Momoa was not injured.

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The motorcyclist was taken to an area hospital for minor, non-life threatening injuries.

"Aquaman" actor Jason Momoa arrives at a movie premiere in LA

Jason Momoa arrives at the premiere of Warner Bros. Pictures' "Aquaman" at the Chinese Theatre on December 12, 2018 in Los Angeles, California. (Kevin Winter/Getty Images)

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It's unclear why the motorcyclist crossed the center line. No charges have been filed in the crash.

Amber Heard Jason Momoa appear in the movie Aquaman

Amber Heard and Jason Momoa in 'Aquaman.' (AP Images)

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Momoa stars in the new "Aquaman and the Lost Kingdom," which is set to be released in March 2023.