Orange County Fire Authority Capt. Larry Kurtz told AP the three male passengers in the SUV received minor injuries and a woman suffered critical injuries.
Alongside fellow amusing or Die co-creator Billy Eichner, Ferrell appeared at the Oceanside event as Ron Burgundy, the fictional 1970s newsman from his 2004 San Diego-based comedy "Anchorman".
Three people, including actor and comedian Will Ferrell, were taken to a hospital after an SUV the actor was in flipped during a two-car accident.
Video obtained by TMZ shows firefighters lifting Ferrell into an ambulance while he talks on his cellphone.
Witnesses told TMZ another auto side-swiped the vehicle before it flipped over.
The SUV spun and flipped over.
According to the statement, which was released by Ferrell's agency UTA, Ferrell and Andrew Steele were "unhurt" by the accident and promptly released from the hospital. The outlet also says the driver of the Toyota walked away unharmed. Ferrell appeared as Ron Burgundy from the movie Anchorman.
The crash remains under investigation. "Very scary but very thankful everyone is OK".