The upcoming LGBT+ drama, which follows a group of friends in 1980s London who grow up in the shadow of the HIV/AIDS epidemic, will premiere 22 January on Channel 4.
According to Radio Times, all five episodes will be available to stream on All4 immediately after.
The series, which was created by Queer As Folk and Doctor Who visionary Russell T Davies, also stars Neil Patrick Harris, Keeley Hawes, Stephen Fry, Tracy Ann Oberman, and Shaun Dooler.
An official synopsis for It’s A Sin reads: “It’s 1981, the start of a new decade and Ritchie, Roscoe and Colin begin a new life in London.
“Strangers at first, these young gay lads, and their best friend Jill, find themselves thrown together, and soon share each other’s adventures.
“But a new virus is on the rise, and soon their lives will be tested in ways they never imagined. As the decade passes, and they grow up in the shadow of AIDS, they’re determined to live and love more fiercely than ever.”