The factual entertainment series involves a number of contestants living together - but never actually meeting in person.
Instead, they interact solely via a social media platform called The Circle, competing for a prize given to the most popular contestant.
The contest sees the contestants rate one another and the least liked faces being 'blocked' and removed from The Circle.
In the live final of last year's first series, catfishing Alex Hobern, who took on the persona of Kate throughout the run, won a total prize of £75,000.
Now Channel 4 has confirmed a second series is on the way and applications to be a contestant are currently open.
"ALERT: Applications are *officially* open for Series 2. 😱 Up to £100,000 is waiting for you! #TheCircle #AnyoneCanBeAnyone" they tweeted.
To apply for series 2 of The Circle UK, you must be aged 18 or over by 1 July 2019 to apply and be resident or have the right to reside in the UK. You can the application for online at https://www.thecirclecasting.com/.
Channel 4 previously announced that the second series will see The Circle become more mischievous increasing the gameplay, drama and jeopardy.
Viewers will also be given greater control and increased interactivity with the game. They will be able to influence how the contestants play – leading to unexpected and surprising consequences…
Kelly Webb-Lamb, Channel 4 Deputy Director of Programmes and Head of Popular Factual commented: “It was a genuine risk to take on such an innovative new reality format, but The Circle absolutely struck a chord with young viewers who were utterly gripped by the drama and relationships that unfolded on screen – even though the players never met.
"The second series will have more of what the viewers loved – warmth, humour, more live elements and even more surprises. I’m excited to see how it will build on the success of series one.”
The Circle series 2 will air later in 2019 on Channel 4.