[2] At an early age she aspired to attend the Royal Academy of Dramatic Arts (RADA), but her family decided it would be more practical to send her to Bexleyheath School to learn secretarial skills.
[2] Starting an amateur career as an actress, she joined both the Austral Players and the Erith Playhouse, eventually landing a job with ITV Television.
[4] She became a naturalized American citizen in 1968; in that same year, she married stage actor Walter "Walt" Gilmore, whom she'd met in 1967 while she and he were performing in a play together in a local theatre situated in Southern California.
She was the first woman to direct a major production at the theater in its 16-year history[5] and was lauded for her "keen respect for the play's delicate virtues".
[10][11] The Golden Mall Playhouse ended in 1981 after the city used eminent domain to condemn and demolish it to make way for a Holiday Inn.
[22] Some of her other appearances include guest-starring and recurring roles in shows such as Murder, She Wrote, Hotel, ER, Charmed, Beyond Belief: Fact or Fiction, Mama's Family, My Name is Earl, Monk, Dynasty, Jake and the Fatman, Murphy Brown, Charmed, L.A. Law, The Bernie Mac Show, Pushing Daisies, The Division, and Matlock.
[citation needed] Kosh was falsely reported to have died on October 21, 2020, due to confusion with another woman of the same name who lived in Tucson, Arizona.