Nathan Andersen: A.J. Cook’s Husband, Family, Business, and Life

Have you watched A.J. Cook on Criminal Minds and wondered about the man she has shared most of her adult life with? Nathan Andersen has been beside Cook since well before the long-running crime drama made her a known face on TV.

Nathan Andersen is not a regular Hollywood figure. His public story is tied to family, business, and a marriage that began when both he and Cook were still very young. Their two sons later became part of Criminal Minds too. That created an unusual link between the Andersen family and Cook’s best-known role.

Nathan Andersen and A.J. Cook have now been married for more than two decades. Their story began in a college film class and grew through parenthood and creative work. Years later, their real sons played the children of Cook’s fictional TV character.

Quick Bio

Full Name	Nathan Andersen
Known For	A.J. Cook’s husband, business owner
Spouse	A.J. Cook
Marriage Date	August 3, 2001
Children	Two sons, Mekhai Allan and Phoenix Sky
College Link	Met A.J. Cook in a film class
Business Work	Founder of Walter Sky
Family TV Link	Both sons have appeared on Criminal Minds

Who Is Nathan Andersen?

Nathan Andersen is an American business owner best known publicly as the husband of actress A.J. Cook. Cook has played FBI profiler Jennifer “JJ” Jareau on Criminal Minds and Criminal Minds: Evolution for much of the franchise’s run.

Nathan Andersen has kept a much lower public profile than his wife. He has not spent his life inside her career. Southbay Magazine profiled him as the creator of Walter Sky, a clothing and lifestyle brand. It was built around his interest in travel, the outdoors, and his family roots.

His link with Cook began before Criminal Minds existed. They met in a film class while Cook was studying in Utah. Cook later described the meeting as an instant connection. That early connection became a marriage in 2001 and, years later, a family with two sons.

A College Film Class Started Their Story

Nathan Andersen and A.J. Cook’s story begins with a college memory Cook has shared herself.

According to Southbay Magazine, Cook went to college in Utah to study film. She met Andersen in a film class. Cook recalled seeing him and feeling an immediate link. She said Andersen later told his roommate that he had met the girl he would marry.

That memory gives useful context to their marriage. Cook’s acting career was only beginning to take shape. She had not yet become JJ on Criminal Minds. Neither of them could have known how long the show would later become part of their family life.

Cook soon landed work in The Virgin Suicides, directed by Sofia Coppola. Southbay reported that Andersen visited her while the movie was filming in Toronto. Their bond therefore grew at the same time Cook was moving from film school into acting.

Nathan Andersen and A.J. Cook Married in 2001

Nathan Andersen married A.J. Cook on August 3, 2001. PEOPLE has continued to identify the couple as married in its recent reports of the Criminal Minds: Evolution cast.

By October 2026, their marriage has passed the 25-year mark. That long timeline stands out because Cook’s career changed greatly during those years. She moved through film and TV roles before Criminal Minds became the part most closely linked with her name.

The marriage also predates Criminal Minds by several years. Cook joined the CBS drama when it began in 2005. Nathan Andersen was already part of her life before the demands of a network series and wider fame. He was still there when the Paramount+ revival arrived.

Their bond has at times appeared in interviews. The couple has not turned their marriage into a public brand. Cook has shared parts of their story over the years, especially moments tied to their marriage, children, and family life.

Building a Family While Criminal Minds Grew

Nathan Andersen and Cook welcomed their first son, Mekhai Allan, on September 13, 2008. Their second son, Phoenix Sky, was born on July 23, 2015.

Those dates matter to Criminal Minds fans because Cook’s real family became connected with JJ’s fictional family. PEOPLE reported that both of Cook’s pregnancies were written into the series.

Mekhai went on to play Henry LaMontagne, JJ’s older son. Phoenix played Michael LaMontagne, her younger son. That means Cook did not simply return to a set after becoming a mother. Her sons later shared scenes and screen history with her.

The link has continued into Criminal Minds: Evolution. In 2026, Parade reported on an episode featuring both of Cook’s real-life sons as JJ’s children. For viewers who have followed the show for years, the casting gives the fictional family a rare real-world layer.

Andersen is not an actor in that family story, yet his place in it is obvious. He and Cook raised the two boys who later became part of one of TV’s longest-running crime franchises.

Mekhai and Phoenix Grew Up Around Their Mother’s Work

Mekhai first appeared as Henry when he was young. Phoenix later joined the series as Michael. Their appearances were not random guest roles. They played the sons of their mother’s character.

That choice created a natural overlap between home life and Cook’s work. Longtime viewers have watched the boys grow through rare appearances. The family did not build a separate child-acting career around fame.

That family link did not end with the original CBS series. Criminal Minds: Evolution brought the characters back. The Andersen brothers have continued to appear when JJ’s family is part of the story.

For Andersen, the link is one of the most distinctive parts of his public story. His family did not simply stand beside a TV career. At certain points, the family became part of the show itself.

Andersen Built Walter Sky

Andersen has also pursued business work of his own. Southbay Magazine profiled him as the founder of Walter Sky, a lifestyle and apparel brand.

The name came from family history. The profile explained that “Walter” honored his maternal grandfather, Walter Pelton, while “Sky” came from his father’s middle name. Andersen described both grandfathers as important influences in his life.

The brand was shaped around travel and an outdoor-minded way of living. Southbay described Andersen’s own life through fishing, travel, and time spent far from the normal routine of Southern California.

That business background gives a fuller picture of Andersen. He is often searched because of A.J. Cook. His public work has included business and brand building rather than show business.

An older Animal Fair interview also placed Andersen in the pet-transport field while Cook’s Criminal Minds career was still quite new. Taken together, the profiles show that his working life has changed over time rather than following one single Hollywood path.

Adventure and Family Influenced His Brand

Walter Sky was not presented simply as a celebrity spouse’s fashion project. Andersen connected the brand to trips that shaped him before and after marriage.

Southbay reported that his grandfather Boyd took him fishing when he was young. His maternal grandfather Walter was a business owner and encouraged curiosity and hands-on interests. Andersen later traveled widely, including time in Hawaii and Honduras.

Those trips help explain why the brand used themes such as travel, practical clothing, and life outdoors. They also show why descriptions of Andersen as only “A.J. Cook’s husband” miss much of his story.

His wife has a very visible career. His own work has mostly been quieter and more personal, with family history built directly into the identity of his business.

A Marriage That Developed Alongside a Long TV Career

A.J. Cook’s work life changed many times after the couple married. Criminal Minds premiered in 2005 and became a major part of CBS TV. Cook’s JJ grew from a press liaison into a field agent and senior member of the Behavioral Analysis Unit.

The show ended its original network run in 2020, then returned as Criminal Minds: Evolution. Cook came back with other longtime cast members.

Through that entire span, recent PEOPLE stories still identify Andersen as her husband. Their marriage therefore stretches across Cook’s early film years, the full original Criminal Minds era and the streaming revival.

That timeline is more useful than broad claims about a “perfect” Hollywood marriage. What can be seen clearly is stability. The couple married in 2001, raised two children, and remained together as Cook’s career moved through major changes.

Andersen’s Family Life Is Closely Linked With Creative Work

Film was part of the couple’s story from the beginning. They met in a film class. Cook built a career as an actress. Their sons later appeared on her most famous series. Andersen developed a lifestyle brand with a strong art identity.

Yet the family has not treated every part of life as public content. Andersen gives few interviews. Many basic private details about him are not widely promoted.

That balance helps explain why interest in him has remained steady. Viewers know his wife well through a character she has played for years. Andersen himself has stayed mostly outside the celebrity cycle.

The result is a public story built from a few main areas. Those include the college bond, a long marriage, their sons, his business work, and the family’s unusual link with Criminal Minds.

What Andersen’s Story Looks Like in 2026

In 2026, Andersen remains best known to TV audiences through his marriage to A.J. Cook. PEOPLE‘s recent coverage of the Criminal Minds: Evolution cast confirms that bond. Mekhai and Phoenix remain part of that family story.

The family’s link to the franchise is still active. Cook remains part of Criminal Minds: Evolution. Both sons have appeared again as JJ’s children.

Andersen’s own public profile remains much quieter. That is consistent with the way his story has developed for years. His best-known business project is Walter Sky. His family life is most visible when Cook discusses their bond or when their sons appear with her on screen.

Why Fans Keep Searching for Andersen

Interest in Andersen begins with A.J. Cook. It lasts because his story adds context to a familiar TV face.

He knew Cook before Criminal Minds. He saw her early career take shape. They married years before JJ became a long-running TV character. Their children then grew up and appeared inside the same fictional family millions of viewers already knew.

There is also a separate business side to his life through Walter Sky. That gives readers something more useful than a spouse-only profile. His story connects college, business, family, and TV in a way that developed over more than 25 years.

Final Thoughts

Andersen has built a life that sits close to Hollywood without being centered on celebrity. He met A.J. Cook in a college film class, married her in 2001 and became the father of two sons who later joined their mother on Criminal Minds.

His work with Walter Sky shows another side of his story, shaped by travel, family roots, and business. Meanwhile, the continued success of Criminal Minds: Evolution keeps the Andersen family’s link to the series alive.

For another celebrity-family story, explore the profile of Annie Costner on LakewoodScoop.co.uk. See how Kevin Costner’s eldest daughter built a creative career of her own.