Nick at Nite UK and Ireland is a television channel dedicated towards adult and/or adolescent audiences with a lineup of mainly live-action sitcom reruns and reruns of TV shows made between the 1940s and the early 2000s and a limited amount of original programming, broadcasting nightly on the channel space of Nickelodeon. In the UK and Ireland it is operated under a joint venture between Viacom International Media Networks Europe and Sky plc.
On 1 September 1993, a localised version of the UCA Nick at Nite programming block launched in the United Kingdom and much later in Ireland. In the United Kingdom, the channel is available on Sky, Virgin Media, TalkTalk Plus TV and Freeview (UK) (via VuTV on channel 238). In Ireland, the channel is available on Virgin Media Ireland, eVision and Sky Ireland.