Suggestions by @jackslater4
1,571 suggestions

Eric Idle
as David Frost in Frost/Nixon (1977)
Peter Finch
as Richard Nixon in Frost/Nixon (1977)
Don Rickles
as Swifty Lazar in Frost/Nixon (1977)

James Coburn
as Jack Brennan in Frost/Nixon (1977)

William Hootkins
as Harry F. Mudd in Star Trek with Star Wars Actors

María Conchita Alonso
as Consuela in Rio Bravo (1989)

Chow Yun-Fat
as Wah Sing Ku in Lethal Weapon Series (1987-‘98) Alternate Cast

Nichelle Nichols
as Trish Murtaugh in Lethal Weapon Series (1987-‘98) Alternate Cast

Charlton Heston
as Bryan Mills in If these roles were cast in the 1980's

Brittany Snow
as Who Has the Worst? in Let’s Compare Track Records

Robert Pattinson
as Who Has the Worst? in Let’s Compare Track Records

Timothée Chalamet
as Who Has the Worst? in Let’s Compare Track Records

Val Kilmer
as Martin Riggs in Lethal Weapon Series (1987-‘98) Alternate Cast

Leonardo Cimino
as Johann Schmidt in Captain America: The First Avenger (1981)
Don Rickles
as Leo Getz in Lethal Weapon 1977-1988.

Richard Kiel
as Mr. Joshua in Lethal Weapon 1977-1988.

John Milius
as Writer in Lethal Weapon 1977-1988.
Charles Bronson
as Michael Hunsaker in Lethal Weapon 1977-1988.

Lee Marvin
as Jack Travis in Lethal Weapon 1977-1988.

Ernest Borgnine
as Ed Murphy in Lethal Weapon 1977-1988.