(written from a Production point of view)
Jill Dorothy Ireland (24 April 1936 – 18 May 1990; age 54) was an English actress who played Leila Kalomi in the Star Trek: The Original Series episode "This Side of Paradise". She filmed her scenes between Wednesday 11 January 1967 and Friday 13 January 1967 at Desilu Stage 9, Stage 10 and on location at Bronson Canyon.
She was married to David McCallum from May 11, 1957 to 1967, with whom she had three sons, including their adopted son Jason McCallum Bronson, who died of a drug overdose in 1989. From October 5, 1968 until her death, she was married to actor Charles Bronson. (Coincidentally, both Bronson and McCallum appeared in the movie The Great Escape.) In 1976, Ireland and Bronson presented the Academy Award for Best Actress, which was given to Louise Fletcher.
Among her early film credits is the 1955 film Oh... Rosalinda!! (with K.L. Smith). Through the 1970s, she appeared in many movies starring her husband Charles Bronson including The Mechanic (1972, with Steve Vinovich, Celeste Yarnall, and Alan Gibbs); Breakout (1975, with Roy Jenson); Breakheart Pass (1975, with Ed Lauter and Roy Jenson); and Death Wish II (1982, with Paul Lambert).
Her television credits include an appearance in My Favorite Martian (starring Ray Walston), a 1968 episode of Mannix with Richard Derr and Sabrina Scharf, and "The Ghost of Sorworth Place", a 1972 episode of Night Gallery, with Richard Kiley and helmed by "This Side of Paradise" director Ralph Senensky. She also appeared in two episodes of 12 O'Clock High, both featuring Seymour Cassel and one of them also featuring William Sargent. She also guest starred in an episode of Voyage to the Bottom of the Sea entitled "The Price of Doom", which was directed by James Goldstone, written by Harlan Ellison and featured Steve Ihnat and David Opatoshu.
Ireland died of breast cancer at the age of 54 in California.
Ms. Ireland "spent the last part of her life conducting a courageous campaign to increase national awareness of the importance of early detection of that terrible disease." (Star Trek Encyclopedia (3rd ed., p. 230)) She wrote two autobiographical books, Life Wish (1987, about her experiences after being diagnosed with breast cancer) and Life Lines (1989, about her adoptive son's drug addiction).