Marlin Brando, Richard Gere, and Clint Easwood all rode 'Bonney's' in their respective classic movies (no prizes for getting them right). James Dean as legend goes, gave away a Harley to Elvis, and was rumoured to have sat on a classic motorcycle called a Bonneville. James' personal bike had "Deans Dillema" painted on the tank. (No, not a movie)

Brando's bike in fact was a Tiger T110 on which the classic Bonneville motorcycle was based. Also appeared in The Wild One.
I'll digress a little here on bike makes as Harley Davidson also had a hand with legends on board. Easy Rider was a 1969 'trip" movie starring Peter Fonda, Dennis Hopper, and Jack Nicholson. It was released in the year of Woodstock and the assinations of Martin Luther King, and Robert Kennedy. Also the election of a president called Nixon.
Fonda, Hopper and Nicholson rode decorated chopped Harley Davidsons (Nicholson spent most of his time as a pillion)