The presenter said she had had a “lovely summer” with “lots of beach action, family, friends, kids” and “ice creams as big as your head” during the break from ITV’s This Morning.
She told co-host Ben Shepherd she was “really excited to come back to work” after the summer break.
Deeley and Kielty released a joint statement in July, revealing they had separated after more than a decade of marriage.
They wed in September 2012 at a ceremony in Rome and have two children together, Milo (9) and James (7).
Paddy Kielty and Cat Deeley
“We have taken the decision to end our marriage and are now separated. There is no other party involved,” they said.
“We will continue to be united as loving parents to our children and would therefore kindly ask for our family privacy to be respected.
“There will be no further comment.”
Kielty, from Dundrum, Co Down, took over as host of The Late Late Show from Ryan Tubridy in 2023.
Deeley has presented ITV’s This Morning alongside Ben Shephard since early last year.
She hosted the US series So You Think You Can Dance, also appearing on SM:TV Live with TV duo Ant McPartlin and Declan Donnelly from 1998 to 2002.
She also previously co-hosted the BBC singing contest Fame Academy and it was while presenting the show, back in 2002, that she met and struck up a friendship with comedian Kielty.
The comedian and presenter began his stand-up career as host of Northern Ireland’s first comedy club, The Empire Laughs Back, in Belfast.
He went on to host programmes such as Channel 4’s Last Chance Lottery and BBC One chat show Patrick Kielty Almost Live.
He also presented the documentary My Dad, The Peace Deal And Me, about his father’s death at the hands of paramilitary gunmen.
Kielty made his feature film debut in 2022 when he starred as a budding comedian going through a marriage break-up in Ballywalter, a movie that takes its title from the town in Co Down.