Peter's Friends
(1992)

A group of old friends gather at Peter's (Stephen Fry) house for New Years, having not seen each other for some time.  Over the next several days Roger (Hugh Laurie) and Mary (Imelda Staunton) reconcile and come to terms with the death of one of their twin boys.  Sarah and Brian break up and he returns to his wife.  Andrew (Kenneth Branagh) and Carol separate with the intention of divorcing and she returns to America.  Maggie (Emma Thompson) comes on to Peter, but he kindly rebuffs her.  Only the old friends are left in the house for the holidays.  Peter reveals to his friends that he is HIV positive and they ring in the new year together.

Thanks Mary C!