Majel Barrett-Roddenberry is an American actress and producer. She is also the widow of television director/producer/writer and Star Trek creator Gene Roddenberry.
As a result of her marriage to Gene Roddenberry and the fact that she has been in every Star Trek series, she is sometimes referred to as "the First Lady of Star Trek."
Barrett has been in every incarnation of the popular science fiction Star Trek, franchise since the very beginning. She first appeared in Star Trek's initial pilot, The Cage, as the USS Enterprise's unnamed First Officer, Number One.
Barrett is said to have been cast as Number One in part because of her romantic involvement with Roddenberry. The mere idea of having an otherwise unknown woman, in a leading role, with a position authority, because she was his girlfriend, is said to have infuriated NBC network executives who insisted that Roddenberry give the role to a man.
Her role in the second pilot, and subsequent episodes of Star Trek was that of Nurse Christine Chapel. In an early scene in Star Trek: The Motion Picture, viewers are informed that she had become Doctor Chapel, a role which she reprised in Star Trek IV: The Voyage Home.
Barrett provided several voices for Star Trek: The Animated Series, including those of Nurse Chapel and the communications officer M'ress, the felinoid, Caitian.
Years later, she would return in Star Trek: The Next Generation, cast as the outrageously self-deterministic, iconoclast Betazoid Ambassador Lwaxana Troi.
Barrett, as Troi, would also later appear in several episodes of Star Trek: Deep Space Nine.
She also provided the regular voice of starship onboard computers for Star Trek: The Original Series, Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager, and most of the Star Trek movies.
She reprised her role as a shipboard computer voice in the two episodes of the prequel series Star Trek: Enterprise that involved an earlier time period—a century before the time of Kirk and Spock aboard the Enterprise NCC-1701.
She has also lent her voice to various computer games and software related to the franchise.
As a result of her providing the computer voice in the Enterprise episode In a Mirror, Darkly, Barrett became the first and only actor to participate in all five Star Trek TV series, as well as in both the TOS and TNG film series.