The part-time stripper broke his silence today by tweeting a birthday message for his wife, who was left devastated when she learned of his infidelity earlier this month.
Kieran tweeted at Katie, who turns 36 today: "Happy birthday to my beautiful wife. I love you with all my heart forever and always.
"I will repair your heart and I am looking for the light at the end of the tunnel for our fairy tale ending. Believe in me xx."
Katie has yet to respond.
Former glamour model Katie first announced that she is to divorce part-time stripper Kieran in a series of emotionally-charged tweets on 7 May.
In her messages, she branded Kieran a "disgusting human being" and said he had been having a sexual affair with her friend Jane Pountney, who she described as a "wh*re home wrecker sl*t".
Following her Twitter outburst, Katie - who is almost seven months pregnant with Kieran's second child - visited Jane and Derrick's home in West Sussex, followed by Kieran. The foursome apparently calmly discussed the situation.
Two days after the news broke, Jane spoke out and admitted that she had been having an affair with Kieran. She said she "deeply regrets" what happened.
Kieran had until now remained silent, although it was recently reported that Katie had asked him to move out of their shared West Sussex house and into a cabin in the garden while she thinks about what she wants to do next.
Jane had actually been among the very few guests at Katie and Kieran's wedding in the Bahamas in 2013.
Making it worse for Katie was the fact news of the affair came just three days after she publicly announced she is pregnant with Kieran's second child.
The couple are already parents to son Jett, born last summer.
Since her flurry of tweets announcing Kieran's affair on 7 May, Katie has remained largely absent from the spotlight. Her rep has said she is focusing on her unborn baby and is thankful to fans for all their messages of support.
Last week, it was claimed that Katie had (understandably) cancelled plans to celebrate her 36th birthday today with a pink and white-themed bash organised by Kieran and Jane. Instead it's thought she'll spend the day with family and have a quiet dinner.
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