Sylvia: West (Karoki, Kay, Carlyle)
Alan Macklin
Jane (Bronson) Phillips
Frederic Summers
Irma Olanski
Oscar Stewart
Jonas Karoki
Mrs. Argona / Grace Argona
Bruce Stamford III
Lola Diamond
Father Gonzales
Big Shirley
Gavin Cullen
Wilbur (aka "Muscles")
Gus
Mrs. Karoki
Herbert, the Boy in the Library (uncredited)
Pudgey Smith (uncredited)
Anne (uncredited)
Maitre'd (uncredited)
Molly Banter (uncredited)
Butler (uncredited)
Calligraphy Professor (uncredited)
Sid (uncredited)
Mr. Leland (uncredited)
Assistant Principal (uncredited)
Pancho Guzman (uncredited)
(uncredited)
Professor Eglebert (uncredited)
Clerk at Private Hospital (uncredited)
Peter Memel (uncredited)