The hour-long launch show introduced the first batch of housemates who will compete for a prize of up to £50,000.
Hosted by Maya Jama and Alice Levine, the show has been compared to Big Brother, but with a social media twist.
The opening episode saw several contestants change their identities, age, gender and sexuality “in order to become more popular”.
However, people watching at home were left totally confused by the end of the episode.
Viewers instantly took to social media during the broadcast.
One viewer tweeted: “I’m sat on social media watching people sitting alone on social media taking to other people sat alone on social media….#TheCircle.”
“Wtf, I’m totally confused already.. Kate is Alex, Alex is Kate?? Jennifer is not a doctor?? #TheCircle,” posted another.
A third added: “It’s so funny how Freddie and Kate are both cat fishing each other #TheCircle.”
“Can’t believe I’m actually watching someone’s group chat on tv. What has life come to #TheCircle,” questioned another.
A fifth wrote: “Can’t get over the fact there’s a straight guy pretending to be a girl and a gay guy pretending to be straight, flirting. This is wild #TheCircle.”
“I actually really like the concept of #TheCircle. Fascinating to see the role of social media in our lives, exposed. Might open some eyes, which is exactly what this show should do,” said another.
Contestants are only able to interact within The Circle, a social media site where each housemate can adopt an identity.
It will be up to them whether to play as themselves, a version of themselves or as a completely different person.
Players will spend up to three weeks getting to know each other online, competing in online games and challenges.
To win The Circle and a chance to win the prize fund, a player has to become the most popular.
Players will rate each other every few days, with the highest rated becoming “influencers”.
The lowest rated run the risk of being “blocked”, The Circle’s version of eviction.
When a player is blocked, they get the opportunity to meet another player face to face.
Relationships could be made and broken, grudges could be settled, and true identities will be revealed.
The Circle continues tomorrow on Channel 4 at 9pm.