The evening kicked off with a screening of the first episode of the brand new series, which was held at the Ham Yard Hotel.
Reveal also attended the private bash to watch the brilliant return of our Chelsea favourites, and after the screening, Jamie was most definitely in the party spirit.
Dressed in a printed black shirt and cap, Jamie looked his usual cheeky self as he posed for pictures.
After enjoying a night of partying, Jamie was seen hanging out with some of his co-stars outside, but perhaps some of them were a little worse for wear? Co-star and love interest Jess Woodley was seen crouching down to Jamie - we have no idea what was going on!
The last time we saw Jamie on screen in spin-off series MIC: LA, he was at the centre of more drama after enjoying a fling with US beauty Naz Gharai, despite still harbouring feelings for Jess.
At the end of the summer trip, Jamie decided he wanted to be with Jess, but she said she didn't quite feel the same.
However, in a sneak peek of the new series at the end of the LA episode, viewers saw Jamie back in Chelsea revealing that he and Jess actually slept together.
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MIC's most shocking moments: