His Royal Slyness: Reparto
Harold Lloyd
The American Boy
Mildred Davis
Princess Florelle
Harry 'Snub' Pollard
Prince of Rochquefort
Gus Leonard
King Razzamatazz / Bolshevik orator
Noah Young
The Prince's tutor
Roy Brooks
Courtier
William Gillespie
Courtier
Helen Gilmore
Queen Razzamatazz
Gaylord Lloyd
The Prince
Marie Mosquini
The Vamp
Charles Stevenson
Man who won't buy books
Robert Emmett O'Connor
(uncredited)
