Claim: A.J. Cook worked with David R. Ellis.

Andrea Joy `` A. J. '' Cook -LRB- born July 22 , 1978 -RRB- is a Canadian actress 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 -LRB- 1999 -RRB- , Out Cold -LRB- 2001 -RRB- , and Final Destination 2 -LRB- 2003 -RRB- .