* John Derek as Johnny Blair
* Mamie Van Doren as Sue Randall
* Richard Denning as Ted Randall
* Merry Anders as Patty Blair
* Jim Backus as Frank Randall
* Thelma Ritter as Mrs. Randall
* Dick Sargent as Tom Blair
* Susan Cabot as June Blair (uncredited)
It's worth noting that the film was originally titled "The Randall Affair" and later retitled "Out of Step."