Nathan Andersen: Everything to Know About A. J. Cook’s Husband

Nathan Andersen is an American businessman and fashion designer. He is best known as the husband of A. J. Cook. She plays JJ in the hit TV show Criminal Minds. But Nathan has his own story to share.

He loves his family, fashion, and outdoor trips. He also helped start Walter Sky, a clothing brand. Nathan enjoys climbing mountains and visiting new places. His life shows that there is much more to him than being a famous actress’s husband.

In 2026, Nathan and A. J. Cook have been married for 25 years. They have two sons and a happy family life. This article looks at Nathan’s childhood, education, love story, marriage, and work. It also shares some fun facts about him.

Nathan Andersen Quick Bio


Full Name	Nathan Andersen
Famous As	A. J. Cook’s husband
Birthday	May 25, 1978
Age	48 years old in 2026
Birthplace	United States, reportedly Utah
Nationality	American
Zodiac Sign	Gemini
Education	Utah Valley University
Work	Businessman, fashion designer
Brand	Walter Sky
Brother	Wesley Andersen
Wife	A. J. Cook
Marriage Date	August 3, 2001
Kids	Mekhai and Phoenix
Kids on TV	Both appeared in Criminal Minds
Health	Cancer-free since 2019
Net Worth	About $4 million, unconfirmed
Height	Not publicly known
Instagram	@nathanandy
Interests	Travel, climbing, nature
Books	No known books

Who Is Nathan Andersen?

Nathan Andersen is an American fashion designer and businessman. He is one of the people behind Walter Sky, a clothing brand. Many people know him because he is married to A. J. Cook, a well-known Canadian actress.

His wife became famous for playing Jennifer Jareau in Criminal Minds. While she works on TV, Nathan has built his own career. He enjoys making clothes that people can wear while traveling, climbing, or spending time outdoors.

Nathan is also a loving father and husband. He likes sharing family photos and travel pictures on Instagram. Even though his wife is famous, Nathan does not share every part of his life. He likes keeping some things private.

Nathan Andersen’s Early Life and Family

Nathan Andersen was reportedly born on May 25, 1978, in the United States. Some reports say he was born in Utah. He grew up in a family that loved sports, nature, and outdoor fun. His childhood was full of adventure.

His father was an athlete who later became a businessman. His mother also loved sports and skiing. As a child, Nathan enjoyed climbing, walking around, and finding new places. His parents helped him enjoy these fun outdoor activities.

Nathan also has a brother named Wesley Andersen. The two brothers share a love for travel and nature. They later started a clothing business together. Nathan has not shared much about his parents, so their names are not widely known.

Nathan Andersen’s Education

Nathan Andersen’s birthday is widely reported as May 25, 1978. This means he turned 48 years old in May 2026. His zodiac sign is Gemini. However, his exact birth date has not been confirmed by official public records.

Nathan went to Utah Valley University in Orem, Utah. Reports say he studied film and how people share ideas through media. During college, he learned about movies and the world of entertainment. He also made some important friendships.

College brought Nathan something very special. He met A. J. Cook while they were both students. Reports say they took a film class together. Their friendship grew over time, and they soon became more than just college friends.

How Nathan Andersen Met A. J. Cook

Nathan Andersen met A. J. Cook at Utah Valley University. They were both young students when their paths crossed. Reports say they first met in a film class. Neither knew that this meeting would change their lives forever.

They started spending time together and slowly fell in love. Cook wanted to become an actress, while Nathan was still finding his career path. They stayed close as they worked toward their dreams and planned their future together.

Their love story began before Cook became famous. She had not yet become the JJ that millions of fans know today. Nathan knew her during her early years. Their bond grew stronger, and they later decided to get married.

Nathan Andersen and A. J. Cook’s Marriage

Nathan Andersen married A. J. Cook on August 3, 2001. They were young when they started their married life. Over the years, they built a home, raised two sons, and supported each other through both good and hard times.

In 2017, Cook shared a sweet message on Instagram for their 16th wedding anniversary. She called their marriage “Solid. Steady. Secure.” She also said their two boys had brought so much into their lives. Her words showed her love for Nathan.

The couple marked 20 years of marriage in 2021. Cook shared another loving message about their family and wedding memories. In August 2026, they reached 25 years of marriage. Their long love story is one reason fans admire them.

Nathan Andersen’s Career Before Fashion

Before working in fashion, Nathan Andersen tried working in Hollywood. He had studied film in college and wanted to learn more about entertainment. But after some time, he felt that this kind of work was not right for him.

Nathan then started helping a friend with a new business. Reports say he spent about ten years working on it. During that time, he learned how to run a business, make plans, and turn ideas into something people could use.

Even while working in business, Nathan still loved outdoor trips. He enjoyed climbing, traveling, and finding new places. This gave him an idea for a clothing brand. He later joined his brother Wesley to create Walter Sky.

Nathan Andersen’s Walter Sky Clothing Brand

Nathan Andersen started Walter Sky with his brother, Wesley Andersen. The brand was reportedly launched in 2018. It makes simple clothes for people who love travel and outdoor fun. Nathan wanted to create clothes that look good and feel nice.

Walter Sky focuses on clothes that people can wear in many places. The brand aims to make items that work in different kinds of weather. Its goal is to help people feel good while exploring new places or enjoying daily life.

Nathan used his love for nature to help build the brand. He knew what people needed while climbing or traveling. Starting a business was not easy, but he kept working toward his dream. Walter Sky became an important part of his career.

Nathan Andersen’s Love for Travel and Adventure

Nathan Andersen has loved outdoor trips since he was a child. He grew up climbing, exploring, and spending time in nature. His parents also enjoyed outdoor sports. This helped him build a strong love for travel and adventure.

He enjoys visiting mountains, beaches, and quiet places. He also likes exploring canyons and areas far from busy cities. Nathan has shared travel photos on Instagram. These pictures give fans a look at the places he enjoys visiting.

His love for travel also helped shape his work. He wanted to make clothes that people could wear during outdoor trips. For Nathan, travel is more than a hobby. It is also a big part of his life and work.

Nathan Andersen’s Children and Family Life

Nathan Andersen and A. J. Cook have two sons. Their first son, Mekhai Allan Andersen, was born in September 2008. Their second son, Phoenix Sky Andersen, was born on July 23, 2015. The boys are growing up with loving parents.

Both sons have appeared in Criminal Minds. Mekhai played Henry LaMontagne, while Phoenix played Michael LaMontagne. They played the children of their mother’s TV character, Jennifer Jareau. This made their small acting roles special for the family.

Nathan enjoys spending time with his boys. He has shared fun family photos on Instagram. In 2018, he posted a picture of Phoenix washing a car and made a joke about candy. These moments show his playful side as a father.

Nathan Andersen’s Cancer Battle and Recovery

Nathan Andersen faced a hard time when he battled cancer. His health news became public in September 2019. He shared a photo on Instagram that showed a scar on his neck. He also shared the happy news that he was cancer-free.

His wife, A. J. Cook, was very happy about his recovery. She shared a loving message on Instagram and wrote, “Cancer picked the wrong guy to mess with.” She also told Nathan that he had won his fight against the disease.

The family had faced a scary time, but Nathan’s recovery brought joy. Many fans sent kind words and support. Nathan has not shared full details about his cancer type or treatment. His story remains an important part of his life.

Nathan Andersen’s Net Worth and Business Success

Nathan Andersen has earned money through his work in business and fashion. He helped build Walter Sky and also worked with a friend’s company for many years. His career shows his strong interest in making his own business ideas work.

Some websites estimate Nathan Andersen’s net worth at around $4 million. However, this amount has not been confirmed by Nathan or any official records. His true wealth and yearly income are not known to the public.

His wife has also enjoyed a long acting career. Still, Nathan has followed his own path in business. He has worked hard to build something based on his interests. His story shows how a hobby can grow into a career.

Nathan Andersen’s Instagram and Life Today

Nathan Andersen is known on Instagram as @nathanandy. He has used his page to share travel pictures, family moments, and outdoor trips. His posts give fans a small look at his life away from his wife’s television career.

Nathan and A. J. Cook have been linked to the Los Angeles area. They enjoy raising their sons and spending time together. In 2026, Mekhai turned 18, while Phoenix turned 11. The family still keeps many personal details private.

Nathan also enjoys making people smile. He has shared funny pictures of his wife and children. In 2016, he even revealed that he could perform wedding ceremonies. These little facts help fans see his fun and caring side.

Final Thoughts

Nathan Andersen is more than the husband of a famous actress. He is a businessman, fashion designer, father, and outdoor lover. His journey from college to building Walter Sky shows how he followed his own dreams.

His marriage to A. J. Cook is another special part of his story. They met in college and married in 2001. Now, in 2026, they have shared 25 years of marriage and are raising two sons together.

Nathan has also faced hard times, including his battle with cancer. Through it all, family has remained a big part of his life. Today, he is known for his love of adventure, his work, and his long marriage to A. J. Cook.