| Seattle Opera | | | |
| Gary Thor Wedow | Musikalische Leitung | | |
| Tomer Zvulun | Regie | | |
| Erhard Rom | Bühnenbild | | |
| Victoria "Vita" Tzykun | Kostüme | | |
| Brenda Rae | Sopran | Semele | 2015 Feb 21, 25, 28, Mär 04, 07 |
| Mary Feminear | Sopran | Semele | 2015 Feb 22 mat, Mär 06 |
| Stephanie Blythe | Mezzosopran | Ino | 2015 Feb 21, 25, 28, Mär 04, 07 |
| Deborah Nansteel | Mezzosopran | Ino | 2015 Feb 22 mat, Mär 06 |
| John Del Carlo | Bass | Somnus | |
| Randall Scotting | Countertenor | Athamas | |
| Amanda Forsythe | Sopran | Iris | |
| Alek Shrader | Tenor | Jupiter | 2015 Feb 21, 25, 28, Mär 04, 07 |
| Theo Lebow | Tenor | Jupiter | 2015 Feb 22 mat, Mär 06 |