Who Is Nathan Andersen? Meet A.J. Cook’s Adventurous Husband

Most people know A.J. Cook as the smart and strong JJ from Criminal Minds. But not many know much about her husband, Nathan Andersen. He may not be a big Hollywood star, but his life is just as interesting.

Nathan Andersen is a fashion designer, a world explorer, and a cancer survivor. He’s also a loving husband and dad. In this article, we’ll take a closer look at who Nathan really is — his early life, his career, his love story with A.J., and the life they’ve built together.

Nathan Andersen Quick Bio


Full Name	Nathan Andersen
Date of Birth	May 25, 1978
Age (2026)	48 years old
Zodiac Sign	Gemini
Nationality	American
Height (Approx.)	Around 6 feet
Education	Utah Valley University
Profession	Entrepreneur, Fashion Designer
Famous For	A.J. Cook’s husband, Co-founder of Walter Sky
Spouse	A.J. Cook (m. 2001)
Children	2 sons – Mekhai & Phoenix Andersen
TV Connection	Sons appeared on Criminal Minds
Health	Thyroid cancer survivor (since 2019)
Net Worth (2026)	$4 million
Residence	Los Angeles, California

Who Is Nathan Andersen?

Nathan Andersen is a businessman and co-founder of the clothing brand Walter Sky. He is best known to fans as the husband of A.J. Cook, but he is much more than that.

He was born on May 25, 1978, which makes him 48 years old in 2026. Nathan lives a quiet and simple life. He enjoys traveling, climbing, and exploring nature. He often shares calm and thoughtful posts on social media — never too flashy, but always real.

While A.J. is often in front of the camera, Nathan prefers life behind the scenes. But his story is just as full of passion, strength, and love.

Nathan Andersen’s Early Life and Childhood

Nathan grew up in the United States in a very active and supportive family. His father was an athlete who later became a businessman. His mother loved the outdoors and was always open to trying new things.

As a kid, Nathan didn’t like sitting still. He spent his days climbing trees, collecting random treasures, and exploring the world around him. His family cheered him on and always told him he could be anything he wanted.

This strong and adventurous childhood shaped Nathan into the man he is today — someone who still loves nature, movement, and thinking outside the box.

His College Years and Love for Film

After high school, Nathan went to Utah Valley University. He studied Film and Communication, and at first, he thought he might work in the movie industry. He had big dreams and was excited to be creative.

But what made college truly special was something else — it’s where he met A.J. Cook. They were both film students, and they met in class. At first, they were just friends, but that friendship would grow into something more.

This time in his life taught Nathan about art, storytelling, and also love — lessons that would stay with him forever.

How Nathan Andersen Met A.J. Cook

Nathan and A.J. met in a film class. They were both young, full of dreams, and just starting out. They spent time together learning about film, sharing ideas, and helping each other grow.

Their bond started as a strong friendship. A.J. later moved to Salt Lake City, and their connection became even deeper. They supported each other through school and through life’s early struggles.

Before long, they were not just classmates or friends — they were in love. It was real, it was strong, and it was built on a solid foundation of trust and understanding.

Nathan Andersen and A.J. Cook’s Marriage

Nathan and A.J. Cook got married on August 3, 2001. At the time, they were still very young. A.J. has even said in interviews, “We were babies!” But somehow, they made it work — and not just work, but thrive.

Now, after more than 20 years of marriage, they’re still happy and strong. A.J. often shares sweet posts about Nathan, calling him her rock and best friend. Nathan, on the other hand, sometimes calls her “Mamacita” in his fun posts.

They’re a team. Even though A.J. is famous, they live a very normal and grounded life together. Their relationship is filled with love, support, and a good sense of humor.

Becoming a Proud Father

Nathan isn’t just a husband — he’s also a proud and active dad. He and A.J. have two sons:

Mekhai Allan Andersen, born in 2008, and
Phoenix Sky Andersen, born on July 23, 2015.

Both kids are a big part of Nathan’s life. He often shares photos of them hiking, playing, or just having fun at home. One time, he posted a funny picture of Phoenix washing the car and called it “child labor for candy.” It made people smile.

A sweet fact: both sons appeared on Criminal Minds, playing the children of A.J.’s character. So their real family became part of A.J.’s TV family — a special memory for them all.

Nathan Andersen’s Career Journey

After college, Nathan tried working in Hollywood. Since he studied film, it made sense. But after a while, he realized that the fast-paced, fame-driven world wasn’t for him. He didn’t feel happy in that space.

Instead of forcing himself to stay, Nathan made a bold choice. He walked away from the spotlight and took a different path. He joined a friend who was building a startup business and worked there for nearly ten years.

During that time, he learned a lot about business, hard work, and growth. And deep inside, a new dream was forming — one that would soon become his own company.

The Story Behind Walter Sky

That dream became Walter Sky, a clothing brand Nathan created with his brother, Wesley Andersen. The idea was simple: make high-quality clothes for people who travel, move, and live with purpose.

Nathan didn’t want flashy designs. He wanted something minimal, strong, and practical — the kind of clothes you could wear while hiking a mountain or flying across the world.

The name “Walter Sky” came from a personal family idea, something that meant freedom and simplicity. At first, some people didn’t understand his style. But Nathan didn’t stop. He kept testing, learning, and building.

Today, Walter Sky is known for making clothes that are not only comfortable but also made to last, just like Nathan’s approach to life.

Nathan Andersen’s Health Battle with Cancer

In 2019, Nathan Andersen shared something very personal with the world — he had been fighting thyroid cancer. For a long time, he kept it quiet. But after the fight was over, he opened up and shared his journey.

He posted a photo of the scar on his neck, a reminder of what he had been through. Many people who had also battled cancer left kind messages. Some even showed their own scars and said they understood what he went through.

A.J. Cook also shared how proud she was. She posted a sweet message saying, “Cancer picked the wrong guy to mess with. You won, baby!” That moment showed how strong their love is, even during the hardest times. Nathan’s story gave hope to many people.

Nathan Andersen’s Life Today

Now in 2026, Nathan Andersen lives a peaceful and happy life with his family. They are based in Los Angeles, California, but they often travel, hike, and enjoy time outdoors together.

He keeps things simple. On his Instagram page, you’ll see quiet beaches, mountain hikes, and silly family moments. He doesn’t care about fame or trying to impress anyone — he just enjoys the little things.

Nathan also uses his time to grow his brand, Walter Sky, and explore nature with his kids. His life is about love, health, freedom, and creating something real. He lives in a way that matches his values.

Nathan Andersen Net Worth and Success

Nathan Andersen may not be a Hollywood actor, but he has built a strong life of his own. His company, Walter Sky, is doing well, and his earlier years in business also helped him build wealth.

As of 2026, Nathan Andersen’s net worth is estimated at $4 million. This comes from years of hard work, smart choices, and staying focused on what matters.

Even with money and success, he stays down-to-earth. He’s not flashy. He doesn’t post luxury cars or fancy things. His idea of success is being able to live freely, love deeply, and work on something meaningful.

Final Thoughts

Nathan Andersen’s story is not about fame or red carpets. It’s about something more powerful — choosing your own path and staying true to yourself.

He walked away from Hollywood when it didn’t feel right. He beat cancer with quiet strength. He built a business that reflects who he is. And most of all, he’s a kind husband and a hands-on dad who loves his family more than anything.

Whether he’s hiking with his boys, designing simple clothes, or just being there for A.J. Cook, Nathan shows us what a good life can really look like.

His journey reminds us that you don’t have to be famous to be strong, successful, and inspiring.