Jillie Joan Mack was (born December 25, 1957) is a TV actress and wife of Tom Selleck, an American actor and film producer.

Mack was born in England.^[1] She attended school at her hometown, developing a strong interest in dance which led her to take dancing classes early on. During high school, she became active in various school theatrical productions.^[4]

During her time in England, Mack met Tom Selleck who invited her to try her hand at acting in the US, so she moved to the US and was given a role in the series Magnum, P.I., in which Selleck was starring as private investigator Thomas Magnum. After a brief role with the show, Jillie had other guest roles in series such as Tales from the Darkside and "ER" .^[4]

Continuing to look for opportunities, she then had roles in television movies such as "Silver Fox" and "Adventures of Nicholas at Roaring Camp".^[4]

By the time Jillie and her husband Tom Selleck met, he was a divorcee, previously married to model Jacqueline Ray. The two went out for a romantic dinner which led to their relationship, after which the two were often seen at public events though they never confirmed that they were in a relationship. In 1986, the two were spotted together during Tom’s star ceremony at the Hollywood Walk of Fame. Mack married Tom Selleck at the Cherrywood Waterfall Chapel in Lake Tahoe, Nevada on August 7, 1987. The couple has a daughter, Hannah Selleck, born in 1989.^[3][10]