An eccentric millionaire and his grandchildren are embroiled in the plights of some forest gnomes who are searching for the rest of their tribe. While helping them, the millionaire is suspected of being crazy because he's seeing gnomes! He's committed, and the niece and nephew and the gnomes have to find him and free him.
| Actor | Role |
|---|---|
 Walter BrennanD.J. Mulrooney / Knobby | D.J. Mulrooney / Knobby |
 Matthew GarberRodney | Rodney |
 Karen DotriceElizabeth | Elizabeth |
 Richard DeaconRalph Yarby | Ralph Yarby |
 Sean McCloryHoratio Quaxton | Horatio Quaxton |
 Ed WynnRufus | Rufus |
| JJerome CowanDr. Ramsey | Dr. Ramsey |
 Charles LaneDr. Scoggins | Dr. Scoggins |
 Gil LambGas Attendant | Gas Attendant |
 Maudie PrickettKatie Barrett | Katie Barrett |
 Cami SebringViolet | Violet |
 Tom LowellJasper | Jasper |
 Norman GrabowskiMale Nurse | Male Nurse |
 Ellen CorbyEtta Pettibone (uncredited) | Etta Pettibone (uncredited) |
 Byron FoulgerHotel Desk Clerk (uncredited) | Hotel Desk Clerk (uncredited) |
| DDee CarrollSecretary (uncredited) | Secretary (uncredited) |