Seann Walsh insists he's not the person he's been portrayed to be following his split from Rebecca Humphries.
The 32-year-old comedian's relationship ended after Seann was pictured kissing his "Strictly Come Dancing" partner Katya Jones during a recent night out in London.
But speaking on the BBC's "It Takes Two" show, Seann explained: "I think that, obviously I'm sorry for the hurt that I've caused.
"We were getting on well, we were having fun. We had a couple of drinks and made a huge mistake and I regret it deeply."
Rebecca recently confirmed their split in a lengthy statement posted on social media, in which she claimed Seann called her a "psycho" after she speculated he was cheating.
Seann has apologised for hurting Rebecca, but he has also defended his own reputation, insisting he's been portrayed unfairly over recent days.
He said: "I made a mistake, which I'm very sorry for - sorry for the hurt that I've caused.
"You never think about the extent of the damage that you're going to do, in a moment of, you know the mistake that you've made.
"I'm not perfect, far from it. Our relationship wasn't perfect. That doesn't mean I wanted it to end the way it finally did, and I'm very sorry for that.
"I feel it's also important for me to say that the people that know me the most, that love me, they know that I am not the person I'm being portrayed as. I'm still sorry for what I did, but it's very important for me to get that out there."
Meanwhile, Katya, 29 - who has been married to fellow dancer Neil Jones since 2013 - has apologised for the kiss, but also insisted her relationship is "absolutely fine".
Appearing on "It Takes Two", she said: "Obviously I apologise, and I can't apologise enough to everyone who it hurt and involved.
"But, the main thing, me and Neil are absolutely fine and that's what matters to me the most right now and focusing on my job and doing it as professionally I can."