Jillie Mack was born on December 25, 1957, in Devizes, Wiltshire, England. She is a British former stage actress and dancer.
Mack is best known for playing Rumpleteazer in the West End musical Cats and for her decades-long marriage to actor Tom Selleck.
Who is Jillie Mack?
Jillie Mack is a British actress and former dancer from Wiltshire, England. She built her early reputation on the London stage before moving into television.
She is most widely known for her marriage to Tom Selleck.
Mack appeared in a handful of American television productions during the 1980s and 1990s. Since then, she has largely stepped back from acting to focus on her family.
Her life has often been framed around her decades-long partnership with Selleck. Still, her own stage career, especially her run in Cats, remains a defining part of her story.
Early Life of Jillie Mack
Jillie Joan Mack was born on December 25, 1957, in Devizes, Wiltshire, England. She is the daughter of engineer Peter Mack and his wife Betty.
Mack attended St Joseph’s School in Devizes.
Later, she continued her education at St Augustine’s Catholic School in Trowbridge. During these years, she also took weekly dance classes at the Scouts’ Hall on Southbroom Road in Devizes.
At age 16, she moved to East Grinstead to attend ballet school and pursue formal drama training. That move set her on a path toward professional musical theatre.
Jillie Mack Age
Jillie Mack is 68 years old as of 2026, born on December 25, 1957. Her birthday has not yet arrived this year, so her current age reflects the year before her next one.
Her zodiac sign is Capricorn.
She built her stage career throughout her twenties before shifting toward family life in her thirties.
Jillie Mack Ethnicity and Nationality
Jillie Mack holds British nationality and was born and raised in Wiltshire, England. She is white and of English descent.
She later gained American nationality as well, following her long-term life in the United States with Selleck.
Her upbringing in the English countryside shaped her early training in dance, which she pursued through local classes before moving into professional theatre.
Jillie Mack Height and Weight
Jillie Mack stands at 5 feet 5 inches, which converts to about 1.65 meters. Her exact weight is not publicly confirmed.
She trained extensively in dance from a young age.
That background gave her the physicality needed for demanding stage choreography, including her run as Rumpleteazer in Cats.
Jillie Mack Career
Breakthrough Role and Career Start
Mack began her professional career in musical theatre in the late 1970s. In 1978, she appeared as Nancy in a touring production of The Boy Friend, presented by the Marlowe Theatre Company.
A critic reviewing her performance at the Theatre Royal in Norwich praised a tango she performed alongside a co-star.
By 1980, at age 22, Mack had built a steady stage résumé. She appeared in a pantomime season at the Adeline Genée Theatre in East Grinstead and played Miss Pepper in The Gingerbread Man.
She also returned to The Boy Friend in a later touring production and appeared in Joseph and the Amazing Technicolor Dreamcoat.
Notable Roles and the Cats Years
Mack’s defining stage role came when she joined the West End production of Cats, playing the mischievous Rumpleteazer. In 1983, actor Tom Selleck was filming Lassiter in London and began attending performances of Cats repeatedly.
That interest eventually led to the two meeting in person.
Selleck asked Mack to dinner, and the two soon began a relationship. After her contract with Cats ended, Mack moved to the United States to be with him.
In 1984, she made her American television debut in an uncredited role as Sally Ponting in a Magnum, P.I. episode. She also appeared, credited, in a separate Magnum, P.I. episode alongside Selleck.
Recent Work
Following her move to the United States, Mack took on select television roles, including guest appearances on ER and Tales from the Darkside. She also appeared in the TV movies Silverfox in 1991 and Adventures of Nicholas at Roaring Camp in 1996.
She additionally had a small role on Frasier.
Since the 1990s, Mack has stepped back from regular acting work, choosing instead to focus on raising her daughter and managing life on the family’s ranch in Ventura County, California.
She has made only occasional public appearances since then, often alongside Selleck at industry or family events.
Jillie Mack Filmography
- The Boy Friend (1978), stage, as Nancy
- Cats (early 1980s), West End stage, as Rumpleteazer
- Magnum, P.I. (1984), as Sally Ponting
- Stephen King’s Golden Years (1985)
- Silverfox (1991), as Joanie
- ER, guest appearance
- Tales from the Darkside, guest appearance
- Frasier (1993), guest appearance
- Adventures of Nicholas at Roaring Camp (1996), as Brittany
Jillie Mack Husband
Jillie Mack has been married to actor Tom Selleck since August 7, 1987. The couple wed in a private ceremony at the Cherrywood Waterfall Chapel near Lake Tahoe, Nevada.
They reportedly used assumed names to keep the wedding out of the press.
Selleck was 38 at the time and had already been married. Mack was 25 when the two first met in London during her run in Cats.
Soon after their wedding, Selleck stepped back from his role on Magnum, P.I. to spend more time building a family life with Mack. The couple has lived for decades on a ranch in Ventura County, California.
Mack is also the stepmother of Kevin Selleck, whom Tom adopted during his previous marriage to Jacqueline Ray.
Jillie Mack Children
Jillie Mack and Tom Selleck welcomed their daughter, Hannah Margaret Selleck, on December 16, 1988. Hannah grew up largely away from the spotlight on the family’s ranch.
She later became a professional equestrian.
Hannah has continued to compete in show jumping as an adult, building her own career separate from her parents’ entertainment background.
Jillie Mack Net Worth
Jillie Mack’s estimated net worth is $10 million as of 2026. Her wealth stems from her earlier acting career, along with decades of shared financial life with Selleck.
She has largely stayed out of paid entertainment work since the 1990s.
Her income today ties closely to the couple’s shared property, including their longtime Ventura County ranch.
The Bottom Line
Jillie Mack built her early reputation playing Rumpleteazer in the West End production of Cats during the early 1980s. That role brought her to the attention of Tom Selleck, who attended the show repeatedly while filming in London.
Mack grew up in Devizes, Wiltshire, training in dance from childhood before moving into professional theatre in her teens. She has remained notably private about her family background throughout her public life.
Since stepping back from acting, Mack has focused on family life at the couple’s Ventura County ranch. She and Selleck marked their 39th year of marriage in 2026, with daughter Hannah now a professional equestrian.
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