Annette, Neptune's daughter

Annette Kellerman

King William

William E. Shay

The Old Man of the Sea

Edward Boring

King Neptune (as William Welch)

William Welsh

Princess Olga

Leah Baird

Roador the Wolf

Mrs. Herbert Brenon

Duke Boris

Edmund Mortimer

Count Rudolph

Lewis Hooper

The Sea Witch

Mrs. Allen Walker

Jailer's Mother

Millie Liston

Princess Olga as a Child

Katherine Lee

Writer

Leslie T. Peacocke

Music

Robert Hood Bowers

Assistant Director

Otis Turner

Director

Herbert Brenon

Cinematography

André Barlatier