This image released by Paramount Pictures shows Dwayne Johnson in a scene from 'Hercules'. Photo:Paramount Pictures, Kerry Brown

San Diego - Hercules came to Comic-Con.

Dwayne Johnson has made an unannounced appearance inside the San Diego Convention Centre's largest exhibition hall.

He slapped high-fives with fans on Thursday and announced a free, advanced screening of his latest movie, ‘Hercules’.

Johnson, who plays the title character in the film, said he booked three San Diego theatres for the special screening and invited everyone in the exhibition hall.

‘Hercules’ opens on Friday. - on Sapa-AP