Walter Brennan - D.J. Mulrooney/Knobby

Matthew Garber - Rodney Winthrop

Karen Dotrice - Elizabeth Winthrop

Richard Deacon - Ralph Yarby

Tom Lowell - Jasper

Sean McClory - Horatio Quaxton

Ed Wynn - Rufus

Jerome Cowan - Dr. Conrad Ramsey

Charles Lane - Dr. Scoggins

Norman Grabowski - Male Nurse

Gil Lamb - Gas Attendant

Maudie Prickett - Katie Barrett

Cami Sebring - Violet

Virginia Aldridge - Gnome Maiden (uncredited)

Jackie Andre - Married Gnome (uncredited)

Parley Baer - The Owl (voice) (uncredited)

Ernestine Barrier - Nell (uncredited)

Hal Baylor - Male nurse (uncredited)

Karin Blake - Married Gnome (uncredited)

Carla Borelli - Married Gnome (uncredited)

Frank Cady - Charlie Pettibone (uncredited)

Dee Carroll - Secretary (uncredited)

Robert Carson - Attendant at Twin Oaks (uncredited)

Marianna Case - Gnome Maiden (uncredited)

Amadee Chabot - Married Gnome (uncredited)

John Cliff - Night Watchman (uncredited)

Ellen Corby - Etta Pettibone (uncredited)

Jack Davis - Manson (uncredited)

Dorothy Duffy - Married Gnome (uncredited)

William Fawcett - Chauffeur (uncredited)

Jesslyn Fax - The Bluejay (voice) (uncredited)

Susan Flannery - Airline Stewardess (uncredited)

Kathy Foley - Gnome Maiden (uncredited)

Byron Foulger - Hotel Desk Clerk (uncredited)

Kathee Francis - Gnome Maiden (uncredited)

Pamela Gail - Snapdragon (uncredited)

Susan Gates - Gnome Maiden (uncredited)

Sandra Lee Gimpel - Gnome Maiden (uncredited)

Nancy Gould - Married Gnome (uncredited)

Barbara Halpern - Gnome Maiden (uncredited)

Karl Held - Paul (uncredited)

Bunny Henning - Gnome Maiden (uncredited)

Susan Henning - Gnome Maiden (uncredited)

Pamela Howard - Married Gnome (uncredited)

Mickey Martin - Bellboy (uncredited)

Joyce Menges - Gnome Maiden (uncredited)

Carol Merrill - Married Gnome (uncredited)

Alvy Moore - Gas Station Mechanic (uncredited)

Jimmy Murphy - The Raccoon (voice) (uncredited)

Toni O'Connor - Gnome Maiden (uncredited)

Carol O'Kane - Married Gnome (uncredited)

Brenda Power - Married Gnome (uncredited)

Jacki Ray - Gnome Maiden (uncredited)

Pat Ann Reid - Gnome Maiden (uncredited)

Dyane Robins - Gnome Maiden (uncredited)

Jeanne Shipman - Married Gnome (uncredited)

Charles Smith - Attendant at Airport (uncredited)

Lee Stanley - Singing Gnome (uncredited)

Cindy Taylor - Gnome Maiden (uncredited)

Dale Van Sickel - Uniformed Guard (uncredited)

Judy Van Worner - Gnome Maiden (uncredited)

Mimi Zerbini - Gnome Maiden (uncredited)