The Only Thing

Elinor Glyn, to whom the human heart is an open book, has here pictured her greatest romance!

Thyra arrives in Chekia to wed its old and ugly king. The Duke falls in love with her. A revolution erupts and the king is assassinated. Chief revolutionary Gigberto also falls in love with Thyra. The revolutionaries plan to drown Thyra and Gigberto in a boat, but the Duke takes Gigberto's place. And the loving couple are rescued.

Eleanor Boardman

Thyra, Princess of Svendborg

Conrad Nagel

Harry Vane, Duke of Chevenix

Edward Connelly

King of Chekia

Arthur Edmund Carewe

Gigberto

Louis Payne

Lord Charles Vane

Vera Lewis

Princess Erek

Carrie Clark Ward

Princess Anne

Constance Wylie

Countess Arline

Dale Fuller

Governess

Ned Sparks

Gibson

Mario Carillo

Prime Minister

David Mir

Kaylkur

Mary Hawes

Thyra's Maid

Michael Pleschkoff

Captain of the Guards

Tom Tyler

Party Guest (uncredited)

Joan Crawford

Party Guest (uncredited)