Did Robert downey jr play in queen of the damned?

No, Robert Downey Jr. did not appear in the movie "Queen of the Damned". The main roles were played by:

* Aaliyah as Akasha, the Queen of the Damned

* Stuart Townsend as Lestat de Lioncourt

* Marlon Wayans as Khayman

While Robert Downey Jr. is a well-known actor, he was not part of the cast of this film.