Lydia and Ollie are two of 10 celebrities who have headed off to a remote island in secret for Cancer Research's Stand Up To Cancer and fans will get to see how they got on during a four-part series on Channel 4 this October.
The pair were also joined by JLS star Aston Merrygold, former Blue Peter presenter Zoe Salmon and comedian Dom Joly, along with The Hotel's Mark Jenkins, rugby star Thom Evans, Dr Dawn Harper, former Labour councillor Karen Danczuk and comedian Josie Long.
The gang arrived on the island with just the clothes on their backs, basic medical supplies and 24-hours worth of water. From then on, sourcing food and shelter was up to them!
One person who is extremely excited is Lydia's mum and TOWIE co-star Debbie. Taking to Twitter this evening, she gushed: "So so proud of her #StandUp2Cancer." Debbie also called Ollie "a star" for taking part in the charity fundraiser.
Judging by previous series' of The Island, we're pretty impressed that these celebrities have managed to keep quiet about what they had been up to. To say it's tough is an understatement!
Ollie had hinted to fans that he had exciting news while explaining why he was not in last night's Made In Chelsea. He simply said he had been "filming abroad".
He has since revealed: "I am fully delighted to finally announce that I have filmed 'The Island with Bear Grylls' for Stand Up To Cancer for @Channel4 Xx."
We. Can't. Wait!