English actress who played Counselor Deanna Troi, the half-Betazoid ship's counselor, throughout The Next Generation, its four films and later Star Trek series.
Marina Sirtis, an English actress born in 1955, played Counselor Deanna Troi, the half-Betazoid ship's counselor of the Enterprise-D, throughout Star Trek: The Next Generation and its four feature films. Troi's empathic abilities made her a constant presence at the captain's side on the bridge.
Episodes such as The Loss, in which Troi suddenly loses her empathic sense, and Ménage à Troi, featuring her mother Lwaxana, centered on the character. Sirtis also played Troi in the Voyager episodes Pathfinder and Life Line and in the Enterprise finale These Are the Voyages..., and she returned to the role in Star Trek: Picard and Star Trek: Lower Decks.
Outside Star Trek she voiced the gargoyle Demona in the animated series Gargoyles and has worked widely in voice acting and on stage.