Hollywood actress and casting director Barbara Baldavin, perhaps best known for her appearances in the original "Star Trek" TV series, passed away over the weekend at the age of 85, according to The Hollywood Reporter.

Baldavin's death was confirmed by her son, Marc D'Agosta, who said that his mother died on Sunday at her home in Manhattan Beach, California, due to congestive heart failure.

Though mostly known for her relatively small roles in a handful of "Star Trek" episodes, Baldavin also gained a measure of Hollywood fame with a recurring role over several seasons in the "Medical Center" TV drama series as well as her work as a casting associate and director for several TV series and films, predominately during the 1980s.

A studied actress and acting instructor

Per The Hollywood Reporter, Baldavin was born in Quincy, Massachusetts, in 1938 but later moved to California and began acting at El Camino College in Torrance, California, after which she further studied acting and the entertainment industry at the Lee Strasberg Institute in New York City.

Interestingly enough, she shared a birthday and was close friends with the late actress Dawn Wells, a star of "Gilligan's Island," and worked for a time as an instructor at Wells' Film Actors Boot Camp.

She is survived by her two sons, Mark and Joseph, whom she shared with ex-husband Joseph D'Agosta, as well as two granddaughters, Casandra and Justine.

A fan favorite for brief roles in "Star Trek"

According to comic books and sci-fi website CBR, Baldavin became a favorite of "Star Trek" fans despite only appearing in three episodes as two different characters over the three-season run of the original series.

In two episodes of the first season in 1966, she starred as phaser control officer Angela Martine, who was set to be married to another character named Robert Tomlinson, played by actor Stephen Mines, in a ceremony officiated by William Shatner's Cpt. Kirk that was unfortunately disrupted by an attack on the Starfleet.

Baldavin later appeared on the show again for the series finale in 1969, albeit that time as a different character, communications officer Lieutenant Lisa.

CBR further noted that the actress met her future husband, Joseph D'Agosta, by way of her appearances on "Star Trek," as he was the casting director for the original series.

Numerous TV series appearances, later worked as a casting director

Aside from "Star Trek," Baldavin is likely best known for her recurring portrayal of Nurse Holmby on the TV series "Medical Center," a show that ran for seven seasons in the early 1970s in which she appeared in 52 episodes, according to her IMDb page.

However, per THR, she played Nurse Holmby in 51 episodes over the final six seasons of the show but played a different character -- known as Norma Summers, per IMDb -- in the show's first season in 1969.

During her career, she appeared in around two dozen TV series, mostly just once as a guest star but with repeat appearances on a few, including popular hits like "Rawhide," "The Fugitive," "Adam-12," "Columbo," "Mannix," The F.B.I.," "Baretta," "Barnaby Jones," "Charlie's Angels," "The Bionic Woman," "Fantasy Island," "Quincy M.E.," and "Vega$," among others.

Baldavin also appeared in a handful of films over the years but was perhaps most influential in her eventual role as the casting director for several hit programs, including "Father of the Bride," "Square Pegs," "Finder of Lost Loves," "Trapper John, M.D.," and "Dynasty," among others.