Suggestions by @Jeshisthename

Billy Bob Thornton

as Sonar in Dispatch (2005)

Laurence Olivier

as Odin in Thor: The Dark World {1973}

Zsa Zsa Gabor

as Frigga in Thor: The Dark World {1973}

Erik Estrada

as Taneleer Tivan in Thor: The Dark World {1973}

Mako

as Hogun in Thor: The Dark World {1973}

Don Siegel

as Director in Thor: The Dark World {1973}

Stockard Channing

as Sif in Thor: The Dark World {1973}

Chuck Norris

as Fandral in Thor: The Dark World {1973}

Paula Prentiss

as Darcy Lewis in Thor: The Dark World {1973}

Oliver Reed

as Volstagg in Thor: The Dark World {1973}

Fred Williamson

as Algrim in Thor: The Dark World {1973}

George Kennedy

as Malekith in Thor: The Dark World {1973}

Geoffrey Holder

as Heimdall in Thor: The Dark World {1973}

Max von Sydow

as Erik Selvig in Thor: The Dark World {1973}

Jon Finch

as Loki in Thor: The Dark World {1973}

Sissy Spacek

as Jane Foster in Thor: The Dark World {1973}

Rutger Hauer

as Thor in Thor: The Dark World {1973}

Britt Ekland

as Ellen Brandt in Iron Man 3 {1973}

Barbara Streisand

as Maya Hansen in Iron Man 3 {1973}

Ike Eisenmann

as Harley Keener in Iron Man 3 {1973}