Catherine O'Hara
Mrs. Helga Prysselius (voice)
Gordon Pinsent
Capt. Efraim Longstocking (voice)
Dave Thomas
Thunder-Karlsson (voice)
Wayne Robson
Bloom (voice)
Noah Reid
Tommy Settegren (voice)
Olivia Garratt
Annika Settegren (voice)
Judy Tate
Annika Settegren (singing voice)
Carole Pope
Teacher (voice)
Karen Bernstein
Mrs. Ingrid Settegren (voice)
Martin Lavut
Mr. Sven Settegren (voice)
Rick Jones
Constable Kling / O'Malley (voice)
Philip Williams
Constable Klang / Ringmaster (voice)
Mari Trainor
Mrs. Kling (voice)
Elva Mai Hoover
Mrs. Klang (voice)