The star was detained and police seized an air rifle from his property as he was nicked amid allegations he made threats to fire it.
Kieran, 36, who split from former glamour model Katie, 44, back in 2018, was freed from custody following questioning.
He had been taken in on Saturday on suspicion of a firearms’ offence, but was all smiles as he was driven from a West Sussex police station.
Now, the father-of-three looks to have brushed off the arrest, as he took to Instagram to reveal a relaxed Easter celebration at home.
His fiancee Michelle, 40, posted herself ‘cheersing’ a drink with her beau and two other guests as they hosted a gathering at home.
Mother-of-one Michelle, who shares son Apollo, one, with Kieran, tagged the media personality in the posts shared on Monday.
She followed up with a second snap, showing her glass of Prosecco on the table in front of a large bunch of white flowers.
Kieran reposted the images to his fans, as he looked to have moved on past the arrest over the weekend.
Katie’s ex Kieran was freed from custody just after midnight following questioning at a police station in Worthing, West Sussex.
The personal trainer and his fiancee Michelle later put on a united front with their kids at the family home.
Sussex Police officers swooped on the semi-detached property at 4pm on Saturday.
A source said: “Kieran’s air rifle was taken as is standard procedure in an investigation like this.
“Police were acting on claims made over a week ago that he had allegedly threatened to use it.”
And a spokesman for Mr Hayler told The Sun yesterday: “Kieran’s air rifle is perfectly legal — he is confident he has not done anything wrong.
“He is a good, gentle person who wouldn’t hurt anyone, so news of his arrest was a shock. Sadly, there is malicious intent by the people behind it. But he is looking forward to clearing his name.”
Neighbours had told of their shock at seeing police officers turn up at the home that Kieran shares with former air hostess Michelle.