Courteney Cox has served up the best birthday present to the producer of her hit TV show "Cougar Town" - a promise to persuade best pal Jennifer Aniston to sign up for an episode.

Aniston appeared on Cox's last TV series, "Dirt", and now the actress has promised Bill Lawrence, the boss of her new show, that the former "Friends" stars will join forces again.

Thrilled Lawrence tells TV Guide magazine, "Courteney promised me as a birthday gift she'd make that happen, and I think that's supersweet."

There has already been a mini-"Friends" reunion on "Cougar Town" this season - Lisa Kudrow played a bad-tempered cosmetic surgeon.

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