Stephen Mulhern says Amanda Holden flashed her boobs at him and Alesha Dixon is "very naughty".
The 43-year-old star presented 'Britain's Got More Talent' for 13 years until it was cancelled last year and revealed that during his stint, he discovered the 'Britain's Got Talent' judges were a mischievous bunch.
Speaking to The Sun newspaper, he said: "The thing with Amanda is, what you see is what you get. But it's the things you don't see - the stuff we have to take out of BGT - that will shock you. I've had a flash of her boobs and I ask myself the same question, 'How did that come about?' But it was all legal. It was on telly and we had to cut it out."
Referring to Alesha, he added: "Alesha appears slightly perfect and is very cool about what she does, but she is naughty - a lot naughtier than she makes out on that panel."
Meanwhile, Stephen previously revealed his disappointment at ITV's decision to axe 'BGMT' and said presenters Ant and Dec, and judges Alesha Dixon, Amanda, Simon Cowell and David Walliams were also upset.
He said: "It's a shame and when it was decided they weren't going to do the ITV2 version I think the consensus among the boys and judges was this is a massive gap.
"We did it from day one, when there were only three judges. Do I think it's a shame? I do. We got away with a lot of stuff.
"Do I miss 'BGMT'? The answer is yes. But that's life."