(written from a Production point of view)
Irene Kelly (born 25 July 1943; age 78) is a former actress who appeared as the role of Sirah in the Star Trek: The Original Series second season episode "The Omega Glory". She filmed her scenes between Monday 18 December 1967 and Friday 22 December 1967 at Desilu Stage 11 and Paramount's B Tank.
Her acting debut seeming started with uncredited appearances in two Western films The Rare Breed (1966), with Jimmie Booth, Fred Carson, David Brian, Joe Garcio, Bob Herron, Brian Keith, Perry Lopez, Hal Needham, Gregg Palmer, and Ronnie Rondell, Jr., and Incident at Phantom Hill (1966), with Ron Burke, Chuck Courtney, and Paul Fix.
Following her role on Star Trek, she appeared in the film Rosemary's Baby, with Elisha Cook and Gail Bonney. Kelly went on to guest-star on Mission: Impossible, with Tony Dante, Victor Paul, and Robert C. Johnson, later in 1968.
The following year, she appeared in the Western comedy film The Good Guys and the Bad Guys (1969), with Jimmie Booth, Nick Borgani, John Chandler, and Noble Chissell. In 1970, she appeared in another Western comedy film Dirty Dingus Magee, again with Paul Fix, and in 1972, she had a starring role in the Western horror movie Enter the Devil.
Kelly's roles during the 70s were sparse, with an appearance in the short film One Block Away (1975), followed by appearance in the pilot movie for BJ and the Bear (1978), with Ted Gehring and Walt Davis, and finally an appearance in an episode of Quincy (1978), with Whit Bissell, Robert Ellenstein, Robert Ito, and Garry Walberg.
She has since retired from acting.