The Games will see 12 celebrities battle it out over a week of live programming, competing in Olympic events including diving, cycling, running and weightlifting.
Other stars pushing themselves to the limit include former Strictly Come Dancing pro Kevin Clifton, newsreader Lucrezia Millarini, Emmerdale actor Rebecca Sarker and actor Ryan Thomas.
Mel B’s daughter and influencer Phoenix Brown, songwriter Chelcee Grimes and Harry Potter actor Josh Herdman complete the line-up.
Freddie Flintoff and Holly Willoughby will be fronting the action-packed special alongside Alex Scott who will also join as a pitch-side reporter, and Chris Kamara as commentator.
But where is the live show being filmed?
Where is The Games filmed?
The 12 celebrities have been training hard at the Olympic velodrome in Stratford, east London for weeks.
And tonight, they will be pushing themselves in a bid to become champion at the Crystal Palace National Sports Centre in London for the next five days.
The venue consists of a pool, outdoor sports pitches and tennis courts, a stadium, climbing wall and squash courts – which is a perfect place for the stars to show off their sporting talents.
Strictly’s Kevin recently revealed that his biggest concern was ‘showing off’ in front of the live crowd.
‘I’m so used to thinking “let’s entertain everyone,”‘ he enthused.
‘It’ll egg me on and I’m worried that my technique will go out the window because I’ll be like “yeah let’s go!”‘
Elsewhere presenter Holly shared a picture of herself on Instagram with the Unity Allstars, and wrote: ‘Morning… going to miss my @thismorning family this week however I’ve had a change of career and become a Cheerleader… it was only a matter of time… @thegamestv @unity_allstars #thegame’
Fans are excited to see what this week holds, with one commenting: ‘Can’t wait to see this live tonight!! (sic)’
Another added: ‘You make an amazing cheerleader’
As well as live coverage of the events, each episode will feature the celebrities’ preparation as they’re taught the sports from scratch by some of the UK’s top coaches.
Viewers will also follow their gruelling training programme leading up to the competition, as they aim to reach their peak physical condition.
The Games airs tonight at 9pm on ITV.