Format

The second series of the UK Love Island spin-off series Love Island: All Stars, produced by Lifted Entertainment, part of ITV Studios, and GroupM Motion Entertainment, premiered in the UK on 13 January and continues to air daily (except Saturdays) on ITV2 and ITVX: Peacock receives episodes two days after they air in the UK, while in the US the show premiered on 15 January and airs exclusively on Peacock (see the promo below).
In this franchise, the intertwining of celebrities and non-celebrities series is quite curious. The original Love Island was created by ITV Studios in 2005 as Celebrity Love Island (i.e. the celebrity version) for 2 seasons. In 2015 there was a non-celebrity revival, Love Island, which has been hugely successful and influential in British popular culture: in 2018 it became ITV2's most-watched show in its history, and in 2020 it became the most-watched TV show in its target audience of 16-34 year olds. It has been localised in more than 20 countries and is still running in most of them.
In Love Island, a group of contestants, known as ‘Islanders’, live in isolation from the outside world in a Mediterranean villa under constant video surveillance. In order to stay in the villa, the Islanders must pair up with another Islander, whether it be for love, friendship or money, with the overall winning couple receiving a total of £50.000. On the first day, the Islanders will pair up for the first time based on first impressions, but throughout the series they will be forced to 're-couple', where they can choose to stay with their current pair or swap partners.
Love Island: All Stars follows the same rules, but the contestants have been Islanders on previous editions of Love Island (from the second series onwards). So, not exactly 'celebrities', but more like 'previously seen'.