- Bothwell Browne
- Captain Bob White
- Ford Sterling
- Kaiser Bill
- Malcolm St. Clair
- The Crown Prince Freddy
- Bert Roach
- Von Hindenburg
- Eva Thatcher
- The Kaiserin
- Marie Prevost
- A Daughter of Belgium
- Ben Turpin
- A Prussian Guardsman
- Charles Murray
- An Irish-American Soldier
- Chester Conklin
- Officer of Death's Head Hussars
- Heinie Conklin
- Prussian Guard Drill Leader
- Joseph Belmont
- Von Tirpitz
- Jane Allen
- Minor Role
- Billy Armstrong
- Ludwig - Asylum Keeper
- Marion Aye
- Bathing girl
- Bobby Dunn
- Minor Role
- James Finlayson
- Commander's Officer
- George Gray
- Waiter
- Harry Gribbon
- German Guard
- Laurel Lee Hamilton
- Minor Role
- Harriet Hammond
- Minor Role
- Phyllis Haver
- Minor Role
- Frank Hayes
- Ugly Woman
- Fanny Kelly
- The Kaiserin's Lady-in-Waiting
- Patrick Kelly
- Minor Role
- Edgar Kennedy
- German Prison Guard
- Tom Kennedy
- American General
- Myrtle Lind
- Red-Haired Girl
- Roxana McGowan
- Minor Role
- Al McKinnon
- Waiter Pouring Beer
- Steve Murphy
- One of Yankee Birdmen
- Kalla Pasha
- German Guard
- Marvel Rea
- Minor Role
- Wayland Trask
- Large German Officer / Large American Soldier (uncredited)
