The third series of Love Island began on 5 June 2017 hosted by Caroline Flack on ITV2. The series concluded on 24 July 2017. It is the third from the current revived series, but fifth overall. The series was narrated by Iain Stirling. As well as the series airing every night of the week with the Saturday episode being used as a weekly catch-up entitled Love Island: The Weekly Hot List, a new spin-off was confirmed, Love Island: Aftersun hosted by Flack with a studio audience and celebrity guests on Sunday nights after the main show. During the final Aftersun episode of the series, which was presented live from outside the villa, it was announced that there would be a one-off reunion special airing on 30 July 2017 which included all of the Islanders from the series.
On 28 June 2017, it was confirmed that a second villa would be introduced to the show for the first time ever in a twist designed to put the couples to the ultimate test. Eleven new Islanders were introduced during this twist. Mike Thalassitis and Sam Gowland became the first Islanders to return to the villa having been dumped from the island, after being voted back in by the public.
On 24 July 2017, the series was won by Amber Davies and Kem Cetinay, with Camilla Thurlow and Jamie Jewitt as runners-up. The average viewers for this series was 2.52 million,[11] up 1.05 million on the previous series.
Shortly after the final, Cetinay and Chris Hughes released their debut single "Little Bit Leave It" as Chris & Kem. In 2018, Cetinay went onto participate in the tenth series of Dancing on Ice, whilst Jonny Mitchell took part in the twenty-first series of Celebrity Big Brother. It was also announced that Thalassitis would be joining the cast of Celebs Go Dating,[12] and that Chyna Ellis had signed up for Ibiza Weekender.[13] Gowland also joined Geordie Shore from the sixteenth series. In August 2018, Gabby Allen took part in the twenty-second series of Celebrity Big Brother, Montana Brown joins Celebrity Island with Bear Grylls, Olivia Attwood heads around Celebs Go Dating. In 2019, Georgia Harrison and Theo Campbell competed on the 33rd and 34th seasons of MTV's The Challenge whilst Thurlow joined the first series of Celebrity SAS: Who Dares Wins. In 2020, Allen competed on the 36th season of MTV's The Challenge.[14]