The 36-year-old sensationally revealed 27-year-old Kieran's affairs with two of her former best friends earlier this year.
But, following her confession that she is standing by her man, Katie looked in good spirits last night as they last night attended the UK premiere of The Hunger Games: MockingJay Part 1.
Despite the fact she gave birth to her fifth child in August, Katie showed off her svelte figure in a tight, black satin jumpsuit.
Her outfit displayed an eye-popping amount of cleavage, and she teamed it with a faux fur jacket and black and gold heels.
Kieran also looked happier than we've seen him in recent times. The builder and part-time stripper was wearing a white shirt unbuttoned to his chest, a blazer, black skinny jeans and black boots.
They've had their fair share of problems in the last 12 months, but Katie and Kieran have revealed plans to renew their wedding vows.
Although they were all smiles last night, sources told Closer this week that Kieran is getting bored of the over-the-top plans.
They said: "Kieran confronted Katie about her plans for the renewal and dropped the bombshell that he isn't happy with OTT wedding plans."
**Read the full story in this week's Closer, out now. **