The couple have been dating for one year. Rosenstock is the Associate Artist Manager at Dean Artists Management in Toronto.
Jesus Christ Superstar, which will begin previews on March 1 at the Neil Simon Theatre with a March 22 opening, originated at The Stratford Shakespeare Festival. It is directed by Tony Award winner Des McAnuff.
The cast also features Paul Nolan as Jesus Christ, Chilina Kennedy as Mary Magdalene, Tom Hewitt as Pontius Pilate, Bruce Dow as King Herod, Marcus Nance as Caiaphas, and Aaron Walpole as Annas.