Gary 'Gaz' Beadle tried to stop Lillie Lexie Gregg from taking part on 'Ex on the Beach'.
The 'Geordie Shore' star is returning to the programme for the second time and was horrified to find out his former lover had also signed up, as he was worried about what she might reveal.
Lillie said: "Gary didn't want me on there. He messaged me a few times before we started filming. He was panicking.
"I think he knew that a few things would come out. Also this is his work and I was his reality. I suddenly stepped into his workplace."
Gaz admitted he is always baffled by the way producers are able to track down their former flames - especially as even he doesn't remember them all.
He said: "We don't tell them who we've been with - I don't know how they do it.
"They got one person and I don't know how I found her. The problem is, if it's one-night stands, then you're f***ed. You're not going to remember them. I'm like, 'Really? Are you here for me?' "
During filming, Gaz was still in a relationship with Charlotte Crosby but he also hooked up with Jemma Lucy and is rumoured to have had a threesome with Charlotte Dawson and Olivia Wash.
He admitted: "At one point, I Was having breakfast with six of the girls and I thought I'd slept with everyone at the table."
While the identity of the other contestants are always kept under wraps, a number of stars admit they would have walked away from the show if former 'Geordie Shore' star Charlotte had made an appearance.
Kayleigh Morris said: "I would have quit. I can't stand her. She f***ed my ex. She's a hypocrite. She's on 'Geordie Shore' crying because Gaz is getting with girls and she done exactly that to me (sic)."
Lillie added to heat magazine: "Charlotte would have been my worst nightmare. I don't ever want to be in the same room as her. I possibly would have had to leave. She has a lot of enemies in the house."
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