- Roddy McDowall
- Hugh Aylesworth
- Jane Darwell
- Annie
- Stanley Clements
- Tom Sanders
- Katharine Alexander
- Mrs. Mary Andrews
- Donald Douglas
- Mr. George Andrews
- Freddie Mercer
- Don Andrews
- Ann E. Todd
- Betty
- Jill Esmond
- Mrs. Aylesworth
- Fred Walburn
- Dick
- Leon Tyler
- Flip
- William 'Billy' Benedict
- Messenger
- Stuart Robertson
- BBC Broadcast Announcer
- Rene Austin
- Little Girl
- Baby Charlene Barry
- Schoolgirl
- Conrad Binyon
- Billy, Kid Club Member
- Margaret Brayton
- Miss Brayton - Schoolteacher
- Jackie Brown
- Dean / Kid Club Member (uncredited)
- Dennis Chaldecott
- Little Boy on Boat
- Fay Chaldecott
- Little Girl on Boat
- Rae Collett
- Rhona Whitaker
- Carol Coombs
- Patricia Roder
- Don Forbes
- American Broadcast Announcer
- Ted Frye
- Kid Club Member
- Sam Harris
- Man at BBC Radio Station
- Charles Irwin
- Mr. Whitaker
- Colin Kenny
- BBC Radio Technician
- Rae-Nell Laskey
- Child on Boat
- Doris Lloyd
- Mrs. Whitaker
- Gloria Mackey
- Schoolgirl
- Douglas Madore
- Nosey / Kid Club Member (uncredited)
- Harry McKim
- Andy / Kid Club Member (uncredited)
- Terry Moore
- Schoolgirl
- Michael Morgan
- Bunny Roder
- Jean Prescott
- Mrs. Roder
- Tommy Tucker
- Boots, Kid Club Member
- James West
- Ronald, Kid Club Member
- Rhoda Williams
- Schoolgirl
- Sonny Boy Williams
- Beanie, Kid Club Member
