The pair crossed paths at London in the Sky – a dinner experience that suspends diners hundreds of feet above the ground so they can take in views of the city while enjoying a meal.
Kieran, 34 – who was married to 40-year-old Katie in 2013, but they split in 2018, and share seven-year-old son Jett and six-year-old daughter Bunny – attended the event to support Ibiza Weekender star Jordan Davies who was launching his new single at the venue.
While 31-year-old Kris – who dated Katie in 2019, and even became engaged before splitting the same year – was also there to support the reality star.
With the venue being reasonably small, it was unavoidable for the lads not to cross paths – but an eye witness says the two got along swimmingly at the event.
Images of the lads together have been shared by OK! magazine – while a source told New! Magazine: “Kieran and Kris had several chats. They looked like they were getting on so well.”
The source added that the pair were: “having a proper laugh before going up in the sky”.
Both lads have since moved on to happy romances after their respective relationships with Katie came to an end.
Kieran has moved on to become engaged to fiancée Michelle Penticost – with whom he is expecting a new child.
While Kris has enjoyed a high profile romance with Bianca Gascoigne – and although the pair split back in February, the pair have kept the rumour mill busy with speculation they could still be secretly dating.
Katie previously lashed out at Kris over their short-lived romance, and the fact he swiftly found love with a younger model.
She branded him “cheap” when he claimed she had cheated on him with three other men while they were in their own romance.
Katie raged last year: “I’ve been in the media all these years and all I’m going to say is every time there’s been a guy, and it goes back years, ‘Kate’s lying, I haven’t done this, Kate’s lying on that’, and the truth always comes out that I was telling the truth every single time, you know it happens with every situation.
“And just remember, everything I say, I have evidence. Anyone can run their mouths about me, if it makes them feel good to use me as a cheap headline it just explains what they’re about.”
Katie herself is now engaged to one-time Love Island contestant Carl Woods.
The pair announced their news back in March – with Carl becoming the eighth man to be engaged to the glamour model.
Perhaps in preparation for her next ‘big day’, Katie has recently been in Turkey where she has undergone extensive cosmetic surgery – getting a full body liposuction, bum lift, and work to her face, cheeks, lips and eyes.
The star confessed she looked like “a monster” when she emerged from her surgeries while all battered and bruised.
And even admitted she worried she would die as she covered from the painful experience.