A famous stage actor hopes to land the lead role in a big new Broadway musical, but he's unaware his teenage son has already been given the part.
| Actor | Role |
|---|---|
 Donald O'ConnorPat Donahue Jr. | Pat Donahue Jr. |
 Donald CookPat Donahue Sr. | Pat Donahue Sr. |
 Frances DeeLynn Andrews | Lynn Andrews |
 Peggy RyanJudy Watkin | Judy Watkin |
 Eve ArdenJean Matthews | Jean Matthews |
 Thomas GomezMax Wilson | Max Wilson |
 Gavin MuirPrentiss Johns | Prentiss Johns |
 Andrew TombesSam Bassett | Sam Bassett |
 Irving BaconMr. Merney | Mr. Merney |
 Emmett VoganAlsop | Alsop |
 George ChandlerBellboy | Bellboy |
 Eddie DunnPlumber | Plumber |
 Douglas WoodSir Orville | Sir Orville |
 Sidney MillerTony | Tony |
 Helene StanleyJivin' Jills (uncredited) | Jivin' Jills (uncredited) |