Actresses Courteney Cox Arquette, left, and Jennifer Aniston, of the television series 'Friends,' arrive at the 9th annual Screen Actors Guild awards in Los Angeles, in this file photo from March 9, 2003. Aniston guest stars in the season finale of Cox's new FX Networks show 'Dirt,' the network said. She plays Tina Harrod, a rival magazine editor of Cox's ruthless tabloid queen, Lucy Spiller. (AP Photo/Chris Pizzello-File)

LOS ANGELES - Jennifer Aniston is rejoining Courteney Cox on prime time, but this time they're anything but friends.

Aniston, 37, guest stars in the season finale of Cox's new FX Networks show, "Dirt," the network said Monday. She plays Tina Harrod, a rival magazine editor of Cox's ruthless tabloid queen, Lucy Spiller.

The episode, which airs March 27, marks the first time the two "Friends" stars have worked together since the popular, long-running sitcom went off the air in 2004.

"Dirt" takes a dark look at the relationship between the entertainment industry and the tabloids as it follows Cox, 42, as the hard-charging editor of a celebrity rag.

She and her husband, David Arquette, are executive producers on the series with creator Matthew Carnahan and writer Joel Fields.