Nathan Andersen is an American entrepreneur and fashion designer best known as the husband of A.J. Cook, a Canadian actress who stars as Jennifer “JJ” Jareau on the CBS crime drama series Criminal Minds.

Nathan is also the founder of Walter Sky, a clothing brand that creates minimalist and functional apparel for adventure seekers and nature lovers.


  • Full name: Nathan Andersen
  • Date of birth: May 25, 1978
  • Age: 46 years old
  • Gender: Male
  • Place of birth: Utah, USA
  • Nationality: American
  • Profession: Fashion designer and entrepreneur
  • Height: 6 feet 2 inches (1.88 m)
  • Parents: N/A
  • Siblings: Wesley Andersen (brother)
  • Spouse: A.J. Cook (m. 2001)
  • Children: Mekhai Allan Andersen (son, b. 2008), Phoenix Sky Andersen (son, b. 2015)
  • Relationship status: Married
  • Net worth: $2 million

Early Life & Education

Now 46 years old, Nathan Andersen was born on May 25, 1978, in Utah, USA.

He grew up in a Mormon family and attended Utah Valley University, where he studied film.

He met his future wife, A.J. Cook, in a film class, and they fell in love. They married on August 3, 2001, in Salt Lake City, Utah.

A. J. Cook's husband, All About Nathan Andersen Bio: Children, Age, Net Worth, Ethnicity

Personal Life

Nathan Andersen has been married to A.J. Cook for over two decades. They have two sons, Mekhai Allan Andersen and Phoenix Sky Andersen, who were born via natural home birth.

Nathan and A.J. are devoted parents and often post pictures of their family on social media.

They also enjoy travelling together and have visited many countries, such as Iceland, Morocco, Italy, and Japan.

Nathan is a cancer survivor who underwent surgery in 2019 and shared his scar on Instagram with the hashtag #cancerfree.

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He thanked his wife and his fans for their support and encouragement.

He also revealed that he had been diagnosed with bipolar disorder and that he was taking medication and therapy to cope with it.


Nathan Andersen co-founded Walter Sky, a clothing line he launched in 2018 with his brother Wesley Andersen.

Walter Sky is inspired by Nathan’s love for nature and adventure and aims to create simple, comfortable, and durable clothes that can be worn in any environment.

The brand’s motto is “Live Outside the Lines,” reflecting Nathan’s life philosophy.

Nathan is also involved in the film industry, producing and directing some short films and documentaries.

He has also appeared in some episodes of Criminal Minds alongside his wife. He is keenly interested in photography and videography and often showcases his work on his website and Instagram.

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Net Worth

According to some sources, Nathan Andersen’s net worth is estimated to be around $2 million.

He earns income from his clothing business, film projects, and social media endorsements.

Social Media

  • Instagram: @nathanandy
  • Twitter: @nathanandy


  • The Umbrella Man (2016) Producer, Director, Writer
  • Werewolves Within (2021) Executive Producer
  • Criminal Minds (2005-2020) Himself / Detective Grant Anderson / Detective Matt Anderson

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