The Reluctant Astronaut

Don Knotts

Roy Fleming

Leslie Nielsen

Major Fred Gifford

Joan Freeman

Ellie Jackson

Jesse White

Donelli

Jeanette Nolan

Mrs. Fleming

Frank McGrath

Plank

Arthur O'Connell

Arbuckle "Buck" Fleming

Joan Shawlee

Blonde in Bar

Guy Raymond

Bert

Nydia Westman

Aunt Zana

Paul Hartman

Rush

Robert F. Simon

Cervantes

Robert Pickering

Moran

Bill Quinn

Captain Ferguson

Melissa Gilbert

Niece

Burt Mustin

Ned

Marjorie Bennett

Sweetwater Citizen at Mailbox

Herb Vigran

NASA Doctor

Paul Bryar

First Bus Driver (uncredited)

Pamelyn Ferdin

Mary - Little Girl (uncredited)