Most people know A.J. Cook from the famous TV show Criminal Minds. But behind this talented actress is a man who has built his own life, his own business, and his own story. His name is Nathan Andersen. He is a fashion designer, a father, and a cancer survivor. This article tells you everything you need to know about him in a simple and friendly way.
Quick Bio
| Detail | Information |
|---|---|
| Full Name | Nathan Andersen |
| Date of Birth | May 25, 1978 |
| Age | 47 years old (as of 2025) |
| Birthplace | United States |
| Zodiac Sign | Gemini |
| Nationality | American |
| Education | Utah Valley University (Film and Communications) |
| Profession | Entrepreneur, Fashion Designer |
| Brand | Walter Sky (co-founded in 2018) |
| Spouse | A.J. Cook (married August 3, 2001) |
| Children | Mekhai Allan Andersen, Phoenix Sky Andersen |
| Net Worth | Around $4 million (estimated) |
| @nathanandy (personal), @waltersky.co (brand) |
Who Is Nathan Andersen?
Nathan Andersen is an American businessman and fashion designer. He is also the husband of A.J. Cook, the well-known actress who plays Jennifer “JJ” Jareau on Criminal Minds.
Even though his wife is very famous, Nathan has always lived a quiet life. He does not look for attention. Instead, he works hard on his own goals and spends time with his family. He is not just “A.J. Cook’s husband.” He is his own person with his own story.
Nathan was born on May 25, 1978, in the United States. He is 47 years old. His zodiac sign is Gemini. Not much is known about his early life or his parents because he likes to keep personal things private.
What we do know is that he grew up in an active family. His father was a sports player when he was young and later became a businessman. His mother was a skier who loved adventure. So it makes sense that Nathan also grew up loving outdoor activities like hiking, climbing, and exploring.
Education and Early Career
Nathan studied film and communications at Utah Valley University (UVU) in Salt Lake City, Utah. This is also where he met A.J. Cook, his future wife. They were both in the same film class, which is how their friendship started.
After finishing his studies, Nathan tried working in Hollywood. He spent time in the entertainment world. But after some time, he realized it was not the right place for him. He decided to leave and find a different path.
He then spent about ten years working with a friend on a startup business. This experience helped him learn a lot about running a business. But deep inside, he always wanted to do something that matched his love for adventure and travel.
That dream would later become Walter Sky.
Walter Sky: A Brand Born from Passion
In 2018, Nathan Andersen and his brother Wesley Andersen started a clothing brand called Walter Sky. This was not just any clothing brand. It was born from Nathan’s own life and his love for travel, nature, and simple but strong clothes.
Walter Sky makes outdoor clothes that are made for people who love to explore. The clothes are simple, high quality, and work well in many kinds of weather. The brand’s goal is to make a small wardrobe of great items that you can wear in many situations, whether you are hiking, traveling, or just going through daily life.
The name “Walter Sky” comes from a personal family idea. Nathan has said that the brand is close to his heart. At first, it was not easy. Many people did not understand his idea. He heard “no” many times. But he did not give up. He worked harder, tested his designs, and slowly built the brand.
Today, Walter Sky has grown a lot. It has its own Instagram page at @waltersky.co. The brand is a real example of what happens when someone follows their passion and works hard, even when things are difficult.
Love Story: Nathan and A.J. Cook
Nathan and A.J. Cook first met in a film class at Utah Valley University. They became friends, and their relationship grew stronger when A.J. moved to Salt Lake City to be closer to Nathan.
On August 3, 2001, they got married. That was more than 20 years ago, and they are still happily together today.
Their relationship seems very real and loving. Nathan often calls A.J. “Mamacita” on social media, which is a sweet nickname. He sometimes posts funny photos of her too, which shows they have a playful and happy relationship.
When they celebrated their 16th wedding anniversary in 2017, A.J. wrote on Instagram something sweet about how they were very young when they got married but how proud she is that they are still standing together.
In 2021, they celebrated 20 years of marriage. A.J. shared photos of the family and wrote that they have “two amazing boys” and hearts full of love.
Their story is a good example of a real, lasting relationship built on friendship, respect, and love.
Their Two Sons
Nathan and A.J. Cook have two sons together.
Mekhai Allan Andersen is their first son. He is the older brother.
Phoenix Sky Andersen is their second son. He was born on July 23, 2015, just one day after A.J. Cook’s 37th birthday.
Both boys have appeared on the show Criminal Minds. Mekhai played a character named Henry, and Phoenix played a character named Michael. These were the children of A.J. Cook’s character on the show. It was a very special moment for the family.
Nathan loves being a dad. He shares fun moments with his sons on social media. One time, he posted a funny photo of Phoenix washing the car and joked that it was “child labor” in exchange for candy. He also shares photos of them hiking, swimming, and having fun outdoors.
It is clear that Nathan wants to give his boys the same kind of adventurous and active childhood that he had.
Cancer Battle and Recovery
In 2019, Nathan Andersen shared something very personal with the world. He posted a photo on Instagram showing a scar on his neck. In the caption, he wrote that he was cancer free. He did not share all the details, but people quickly understood that he had been fighting thyroid cancer.
The post was brave and honest. Many people left kind messages. Some shared their own stories of cancer. The support was very strong.
A.J. Cook has also spoken about Nathan’s cancer battle. She said it was a very difficult time for their family. She even said that this experience influenced how she played her character on Criminal Minds: Evolution, the new version of the show. The character also dealt with hard personal moments, just like A.J. did in real life.
Nathan is now cancer free. His recovery is a true story of strength and hope. It also shows how important family and love are during difficult times.
Nathan Andersen on Social Media
Nathan is a private person, but he does share some parts of his life on social media. You can find him on Instagram at @nathanandy, where he has around 40,000 followers. He posts travel photos, family moments, and things that match his love for adventure and nature.
His brand Walter Sky also has its own Instagram page at @waltersky.co, with around 11,000 followers.
A.J. Cook’s Instagram is @ajcook. She has over 1.2 million followers.
Nathan does not post every day, and he keeps many things private. But when he does share something, it feels real and honest.
Nathan Andersen’s Net Worth
Nathan Andersen’s net worth is not officially confirmed. But based on reports online, it is estimated to be around $4 million. This comes from his work as an entrepreneur and the success of his Walter Sky brand.
His wife A.J. Cook’s net worth is reported to be around $5 million, thanks to her long acting career.
Together, they seem to be a successful and comfortable family.
What Makes Nathan Andersen Special?
Nathan Andersen is not famous because of TV or movies. He is known because of his own choices and hard work.
He left a world that did not fit him. He spent years learning and growing. He started a brand that truly matches who he is. He fought cancer and came back stronger. He is a good husband and a loving father.
These are the things that make his story worth knowing. He is a real person with real struggles and real success.
He shows that you do not need to be in the spotlight to live a great life. You just need to follow what you love and stay true to yourself.
Final Thoughts
Nathan Andersen is more than just the husband of a famous actress. He is a man who made his own path. He tried different things, failed, learned, and kept going. He started a clothing brand from his heart. He beat cancer. He raised two sons. He has been in love with the same woman for over 20 years.
His story is simple but powerful. It shows that a good life is not about being on TV or being famous. It is about being honest, working hard, loving your family, and never giving up on what you believe in.
10 Frequently Asked Questions About Nathan Andersen
1. Who is Nathan Andersen? Nathan Andersen is an American entrepreneur and fashion designer. He is best known as the husband of actress A.J. Cook and the co-founder of the clothing brand Walter Sky.
2. When was Nathan Andersen born? He was born on May 25, 1978. He is 47 years old as of 2025.
3. Where did Nathan Andersen go to school? He studied film and communications at Utah Valley University (UVU) in Salt Lake City, Utah.
4. How did Nathan Andersen meet A.J. Cook? They met in a film class at Utah Valley University. Their relationship grew stronger when A.J. moved to Salt Lake City.
5. When did Nathan Andersen and A.J. Cook get married? They got married on August 3, 2001.
6. How many children do Nathan and A.J. Cook have? They have two sons named Mekhai Allan Andersen and Phoenix Sky Andersen.
7. What is Walter Sky? Walter Sky is a clothing brand that Nathan co-founded with his brother Wesley Andersen in 2018. It makes simple, high-quality outdoor clothes for people who love adventure and travel.
8. Did Nathan Andersen have cancer? Yes. In 2019, Nathan shared on Instagram that he had battled cancer and was now cancer free. Many people think it was thyroid cancer based on the scar on his neck.
9. What is Nathan Andersen’s net worth? His net worth is estimated to be around $4 million, though this is not officially confirmed.
10. Is Nathan Andersen active on social media? Yes. He is on Instagram at @nathanandy for personal posts and @waltersky.co for his clothing brand. He has about 40,000 followers on his personal page.
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