James Marsden’s Children: Meet Jack, Mary and William

James Marsden has built a long career in Hollywood, with memorable roles in X-Men, Enchanted, Westworld, Dead to Me and Jury Duty. However, the actor has repeatedly described fatherhood as one of the most meaningful parts of his life.

Marsden is the father of three children: Jack, Mary and William. He shares Jack and Mary with his former wife, Lisa Linde, while his youngest son, William Luca, was born to him and former partner Rose Costa.

The actor generally keeps his family away from excessive media attention. Still, his children have occasionally appeared with him at public events, and Marsden has shared glimpses of their lives over the years.

Here is what is publicly known about James Marsden’s children, including their backgrounds, interests and relationship with their famous father.

James Marsden Has Three Children

Marsden became a father during his marriage to actress Lisa Linde. The couple welcomed their son Jack in 2001 and daughter Mary in 2005. After their divorce, Marsden later welcomed William with Brazilian model Rose Costa in 2012.

As of 2026, Jack is 25, Mary is 21 and William is 13.

Despite their different ages and interests, Marsden has spoken warmly about his relationship with all three children. In a 2018 interview with Men’s Health, he described being a father as his proudest achievement and said parenting had become more important to him than his status as a Hollywood actor.

Jack Marsden, James Marsden’s Eldest Son

Jack Holden Marsden was born on Feb. 1, 2001, to James Marsden and Lisa Linde. He is the actor’s oldest child.

Jack attracted public attention as a teenager when he explored modelling. In 2018, he made his runway debut for Dolce & Gabbana in Milan. Marsden publicly celebrated the milestone and spoke about supporting his son as he figured out his interests and future direction.

Jack has also shown an interest in music. Earlier reports identified him as a producer, musician and engineer, with an interest in recording and music production.

Father and son have also shared an interest in cars and racing. Marsden previously appeared with Jack on Celebrity IOU: Joyride, giving fans another glimpse into their relationship.

More recently, Jack and his father made a rare public appearance together in June 2026 for a campaign with The Macallan. PEOPLE reported that the father-son collaboration was connected to the brand’s “Drink of a Generation” campaign. The appearance also highlighted Jack’s move to Nashville following graduation.

Mary Marsden Has Kept a Lower Public Profile

Mary James Marsden was born on Aug. 10, 2005. She is James Marsden’s only daughter and his second child with Lisa Linde.

Compared with her older brother, Mary has generally stayed out of the public spotlight. However, she has accompanied her father and brothers at several family events, including premieres connected to the Sonic the Hedgehog franchise.

Marsden has also shared occasional moments from Mary’s childhood. One memorable example was a video of her playing drums as a young child. In 2023, he shared the throwback while celebrating her 18th birthday.

The actor has previously indicated that Mary showed some interest in entertainment. In comments reported by PEOPLE, Marsden said his daughter had shown interest in following a career path similar to his, although he emphasised that he would support his children in whatever direction they chose.

William Luca Costa-Marsden Is Marsden’s Youngest Child

William Luca Costa-Marsden was born on Dec. 14, 2012, to James Marsden and Rose Costa.

With a significant age gap between William and his older siblings, Marsden entered another stage of fatherhood when his youngest son was born. In a 2014 interview with ABC News, he reflected on becoming a father again and said that parenting felt familiar once he had already experienced it.

William has occasionally appeared alongside his father at public events. He attended Sonic the Hedgehog premieres with Marsden and his siblings, giving fans rare family photographs.

His mother, Rose Costa, has also shared selected moments from their travels and childhood. Public posts highlighted William’s interest in skiing and international travel, although the family generally maintains a relatively private life.

Why Fatherhood Matters So Much to James Marsden

Marsden has been unusually open about the importance of being a father.

During his 2018 Men’s Health interview, he discussed how his own experiences with his parents’ divorce influenced the way he approached parenting. He said that becoming a father helped shift his focus away from himself and toward the responsibility of caring for other people.

He also acknowledged that parenting involves eventually allowing children to make their own choices. For Marsden, being a good father is not simply about providing for his children. It is also about demonstrating character and showing them how to handle mistakes and difficult moments.

That perspective helps explain why he has often spoken about fatherhood with more emotional weight than his Hollywood accomplishments.

James Marsden Keeps His Family Mostly Private

Although Marsden is a recognisable Hollywood figure, his children have not grown up as constant fixtures of celebrity media.

The family has made occasional public appearances together, particularly at movie premieres. Marsden has also shared family photographs and memories on social media, but he generally avoids turning his children’s lives into a major part of his public image.

That balance has allowed Jack, Mary and William to pursue their own interests without being defined entirely by their father’s fame.

What Are James Marsden’s Children Doing Now?

Public information about the three siblings is limited, partly because they maintain relatively private lives.

Jack has explored modelling and music and, in 2026, appeared alongside his father in a major brand campaign.

Mary has remained more private while showing an interest in music and, according to past comments from her father, some interest in entertainment.

William is still the youngest of the three and has largely stayed away from the entertainment spotlight. His publicly shared interests have included skiing and travel.

Because the siblings are not highly active in the public eye, it is important to distinguish confirmed information from speculation about their careers or personal lives.