What is the name of the actress who played Deanna Troi?

The actress who played Deanna Troi is Marina Sirtis. Sirtis portrayed the half-human, half-Betazoid counselor throughout Star Trek: The Next Generation and reprised the role in several Star Trek films and later television series.

Troi serves aboard the USS Enterprise-D as the ship’s counselor, using her empathic abilities to sense the emotions of nearby people. Because she is half Betazoid, Troi can perceive feelings more strongly than a human, though she generally cannot read the minds of fully telepathic species in the same way her mother can. Her professional role often places her at the center of stories involving trauma, diplomacy, and identity.

Marina Sirtis was born in London to Greek parents and trained at the Guildhall School of Music and Drama. After The Next Generation, she appeared as Troi in films including Generations, First Contact, Insurrection, and Nemesis. She also returned in Star Trek: Picard, alongside Jonathan Frakes as William Riker. The other choices are actors associated with different Star Trek characters.