Nathan Andersen is an American entrepreneur and fashion designer. He is the husband of actress A.J. Cook, who is best known for playing Jennifer “JJ” Jareau on Criminal Minds. Nathan is also a founder of the clothing brand Walter Sky.
Nathan and A.J. met during their college years and married in 2001. They have two sons, Mekhai and Phoenix. Away from business, Nathan enjoys travel and outdoor activities. He is also a cancer survivor.
Nathan Andersen’s Profile Summary
| Detail | Information |
|---|---|
| Full name | Nathan Andersen |
| Date of birth | May 25, 1978, widely reported |
| Age | 48 in 2026 |
| Birthplace | United States; Utah is widely reported |
| Nationality | American |
| Education | Utah Valley University |
| Profession | Entrepreneur, fashion designer |
| Business | Walter Sky |
| Brother | Wesley Andersen |
| Wife | A.J. Cook |
| Marriage date | August 3, 2001 |
| Children | Mekhai Allan Andersen and Phoenix Sky Andersen |
| Known for | Walter Sky and marriage to A.J. Cook |
| @nathanandy | |
| Net worth | Not publicly confirmed |
Early Life and Family
Nathan Andersen was born in the United States. His birthday is widely reported as May 25, 1978. Some sources list Utah as his birthplace, although his exact place of birth has not been clearly confirmed.
Nathan grew up with an interest in nature and adventure. Reports say he enjoyed climbing, collecting things, and exploring when he was young.
His father was reportedly an athlete who later became an international entrepreneur. His parents’ names are not publicly known.
Nathan has a brother named Wesley Andersen. The brothers later went into business together.
Education
Nathan attended Utah Valley University, where he reportedly studied film.
This period was also important to his personal life because he met his future wife, A.J. Cook, during college. One report says they first met in a film class.
Career Before Walter Sky
After college, Nathan tried working in the Hollywood entertainment industry.
He eventually decided that entertainment was not the career he wanted and moved into business.
One report says he joined a friend who was building a startup. Nathan reportedly spent about 10 years investing his time and resources in the business.
The name of the company has not been widely reported.
Walter Sky
Nathan Andersen later moved into fashion and became one of the founders of Walter Sky.
His brother Wesley Andersen is also reported to be a co-founder and business partner. One source says the company was started in 2018.
Walter Sky focuses on clothing that can be worn in different places, climates, and environments. The idea fits Nathan’s interest in travel and outdoor activities.
The company promotes a smaller wardrobe built around useful pieces that can work in different situations.
Nathan is commonly described as both an entrepreneur and fashion designer because of his work with the brand.
Who Is A.J. Cook?
Nathan’s wife, Andrea Joy “A.J.” Cook, is a Canadian actress.
She is best known for playing Jennifer “JJ” Jareau in the CBS crime drama Criminal Minds.
A.J. has worked in television and film for many years. Her acting career has made her much more visible publicly, while Nathan has generally kept a lower profile and focused on business.
Marriage to A.J. Cook
Nathan Andersen and A.J. reportedly met while attending Utah Valley University.
They married on August 3, 2001.
The couple celebrated their 20th wedding anniversary in August 2021. A.J. shared family pictures to mark the occasion.
Nathan has also posted about his wife on social media over the years. Some of his posts are affectionate, while others show the couple joking with each other.
Based on the available information, Nathan and A.J. remain married.
Their Children
Nathan and A.J. have two sons.
Their older son, Mekhai Allan Andersen, was born in 2008.
Their younger son, Phoenix Sky Andersen, was born on July 23, 2015.
Nathan Andersen has occasionally shared pictures of his children on Instagram, including photos from family trips and outdoor activities.
Their Sons on Criminal Minds
Both Mekhai and Phoenix have appeared on Criminal Minds.
Mekhai played Henry LaMontagne, the son of A.J. Cook’s character JJ.
Phoenix appeared as Michael LaMontagne, JJ’s younger son.
This allowed A.J.’s real-life children to appear as the children of her television character.
Nathan Andersen’s Cancer Battle
Nathan is a cancer survivor.
His health battle became public in 2019. Near the end of that year, he shared a photo showing a scar on his neck and revealed that he was cancer-free.
A.J. also celebrated the news publicly on Instagram and shared her relief that Nathan had beaten the disease.
The exact type of cancer Nathan had has not been publicly confirmed in the available sources. Some people responding to his post discussed thyroid cancer because they had similar scars, but this does not confirm Nathan’s diagnosis.
Travel and Outdoor Life
Nathan Andersen has a strong interest in nature and adventure.
He enjoys traveling and exploring places away from busy cities. Reports mention his interest in canyons, beaches, and other outdoor locations.
These interests also helped shape the idea behind Walter Sky and its focus on clothing for different environments.
Nathan has reportedly enjoyed exploring nature since childhood.
He Can Officiate Weddings
Nathan revealed through social media in 2016 that he can legally officiate weddings.
There is little public information about when or why he became qualified to perform marriage ceremonies.
Public Appearances
Nathan Andersen sometimes attends public events with A.J. and their children.
In May 2016, he appeared with A.J. at an event at the Beverly Wilshire Four Seasons Hotel.
Nathan, A.J., Mekhai, and Phoenix also attended the premiere of the animated film Wonder Park at the Regency Bruin Theatre in Los Angeles in March 2019.
Most of Nathan’s public appearances are connected with his wife or family.
Social Media
Nathan Andersen has used Instagram under the username @nathanandy.
His posts have included family photos, travel, outdoor activities, humor, and pictures with A.J.
Walter Sky has also used the Instagram account @waltersky.co.
Nathan generally shares less of his personal life than many celebrity spouses and keeps much of his family life private.
Net Worth
Nathan Andersen’s exact net worth is not publicly known.
Several online sources have estimated it at around $4 million, but Nathan has not confirmed this figure.
His income has been linked to entrepreneurship, fashion, Walter Sky, and his earlier business investments.
The $4 million figure should therefore be treated as an online estimate rather than confirmed personal wealth.
Facts About Nathan Andersen
- His birthday is widely reported as May 25, 1978.
- He is American and is reported to be from Utah.
- He attended Utah Valley University.
- He reportedly studied film.
- He met A.J. Cook during their college years.
- Nathan and A.J. married on August 3, 2001.
- They have two sons, Mekhai and Phoenix.
- Both of his sons have appeared on Criminal Minds.
- His brother is Wesley Andersen.
- Nathan and Wesley are associated with Walter Sky.
- He briefly worked in the entertainment industry before moving into business.
- He enjoys travel, nature, and outdoor adventures.
- He can reportedly officiate marriages.
- He announced that he was cancer-free in 2019.
- His exact net worth is not publicly confirmed.
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