Born Sharon Forsmoe in Sioux City, Iowa, she made her acting debut in the 1959 film Kiss Her Goodbye. From the 1960s through the 1980s, Sharon appeared in such films as The Reivers, Marlowe, It's Alive, Night of the Comet, The Stunt Man, Out of the Blue, and Can't Buy Me Love.
In addition to film work, Sharon also appeared in guest starring roles on various television shows including, Death Valley Days, The Fugitive, Gunsmoke, Wagon Train, Ben Casy, Doctor Kildare, and Hawaii Five-O.
Sharon's career was interrupted when her heart stopped beating for four minutes during childbirth. She incurred brain damage, and was virtually unable to read, write, walk or talk. After extensive sessions of re-learning, Sharon returned to acting in the early 1970s, her work load increasing as her recovery progressed. In 1991, she joined the cast of the long-running soap, The Young and the Restless, to prove to Hollywood that she could memorize, hit her marks and show up on time! She remained with the show until 1996. Sharon's most recent role was on a 1999 episode of JAG.
Miss Farrell has been married 4 times: actor Andrew Prine, talent agent Ron Deblasio, actor John Boyer and accountant Steve Salkin. She lived with writer/director/business manager Dale Trevillion from 1976-2006. (a defacto husband). She has only one child, Chance Boyer, with actor John Boyer. Sharon Farrell and John Forthmann Boyer were married June 14,1969 by actor John Phillip Law in a Hopi Indian Ceremony in the Pacific Palisades. Cardinal McIntyre of the Los Angeles Catholic Archdiocese came out of retirement to baptize her son Frederick (Chance) Forthmann Boyer. His Godfather was attorney Greg Bautzer (once married to Joan Crawford) and the Godmother was Anita Sepulveda. John and Sharon were divorced in May 1972. Sharon recently published her memoirs entitled, "Sharon Farrell, Hollywood Princess from Sioux City, Iowa."