We don't know if these exes could be any friendlier! It has just been announced that David Arquette will guest star on the season three finale of estranged wife Courteney Cox's hit show, Cougar Town. OK! GALLERY: DAVID ARQUETTE CELEBRATES ONE YEAR OF SOBRIETY WITH COURTENEY COX AND COCO! According to TVLine.com, David will appear as a hotel concierge on the finale episode of the ABC sitcom, and he will be involved in a sort-of-awkward ... Read More >>