Filmed by Fred J. Balshofer in 1918 as the anti-German war drama Over the Rhine, the project was reshaped and released in 1920 as An Adventuress—a cross-dressing caper set in the fictional republic of Alpania and headlined by female-impersonation star Julian Eltinge, with early appearances by Rudolph Valentino and Virginia Rappe. The film was later re-edited and reissued in 1922 as The Isle of Love.
| Actor | Role |
|---|---|
 Julian EltingeClifford Townsend / Julie | Clifford Townsend / Julie |
| FFrederick Ko VertLyn Brook | Lyn Brook |
 William CliffordDick Sayre | Dick Sayre |
 Leo WhitePrince Halbere | Prince Halbere |
 Virginia RappeVanette | Vanette |
 Rudolph ValentinoJacques Rudanyi | Jacques Rudanyi |
 Stanton HeckGrand Duke Nebo | Grand Duke Nebo |
| CCharles MillsfieldPom Pom | Pom Pom |
 Alma FrancisEunice | Eunice |
 Lydia KnottClifford Townsend's mother | Clifford Townsend's mother |
 Fontaine La RueNot listed | Not listed |
| FFrank GastrockNot listed | Not listed |
| WWilliam PearsonNot listed | Not listed |
| FFrederick HeckNot listed | Not listed |