Andrea Joy Cook (born July 22, 1978) is a Canadian actress best known for her role as Supervisory Special Agent Jennifer "JJ" Jareau in the CBS crime drama Criminal Minds. She has also appeared in films such as The Virgin Suicides (1999), Out Cold (2001), and Final Destination 2 (2003). Cook was born in Oshawa, Ontario, and spent most of her life growing up in nearby Whitby, where she attended Anderson Collegiate Vocational Institute. She has three siblings: Nathan, Paul, and Angela. Cook was declared legally blind in the second grade because of a severe astigmatism, but wore contacts and thick glasses to correct her vision. In 2007 she underwent surgery during which a lens implant corrected the impairment. A dancer from age four, Cook began taking jazz, tap and ballet lessons. She danced competitively for many years, before deciding at the age of 16 that she wanted to try acting. Cook also taught dance when she was younger and has stated that if she hadn't become an actress, she would most likely have set up a small dance studio somewhere. In an interview, she admitted that she still tap dances. Cook is a member of The Church of Jesus Christ of Latter-day Saints, but does not limit her acting solely to roles reflecting her beliefs. On August 3, 2001, she married her long-time boyfriend, Nathan Andersen. The two met in a film class at Utah Valley University, and she later moved to Salt Lake City, Utah to be with him. They reside in Los Angeles, California with their two sons. In September 2008 their son, Mekhai, was born. Mekhai makes a brief appearance as Henry LaMontagne in Criminal Minds, when Cook's character is buying children's medicine from a pharmacy. He reprised the role in the two-hour season seven finale in 2012 and several other episodes throughout the series. The couple's second son, Phoenix Sky, was born in July 2015. He also appears in Criminal Minds as JJ's second son, Michael.

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