Barbara March, recurring Star Trek guest star, has passed away.

She was best known for her role as the Klingon Lursa, one of the Duras sisters, in Star Trek: The Next Generation, Star Trek: Deep Space Nine, and the film Star Trek Generations. Outside of Star Trek, March made guest appearances in a number of TV shows, and was an accomplished stage actor. In addition to her acting work, March was also a playwright and novelist.

Her passing was confirmed on Monday by her husband, Alan Scarfe, on Facebook: “My beloved Barbara, my partner in all things for more than forty years, passed through eternity's gate [Sunday] evening after a cruel battle with cancer.”

Barbara March was 65.