The 'Britain's Got Talent' host - one half of Ant & Dec - is said to have grown close to Ali after ten years of working together, and the couple have enjoyed months of secret dates.
He said: “I think we’ve always been attracted to each other, but it has always been that thing of we work together. This year we went out as a couple.” Asked if he’d be getting married soon, Dec said: “I don’t know.
Speaking about their romance he told the Daily Express: "We always hung out.
The troubled TV star is said to be winning the battle with his booze and drug demons – and is now said to be plotting his big TV comeback.
The Sun on Sunday exclusively revealed in June that Ant had checked into rehab to tackle his substance abuse, prescription drugs and booze issues.
His co-host Ant was of course best man, and 200 guests watched them take their vows, including celebs such as Tess Daly, Marvin and Rochelle Humes.
Declan Donnelly seems to have finally found love again, as it has been reported he is dating his long-term manager Ali Astall.When she was single and I was single we'd go out for dinner on Valentine's Day together. It was a little strange because we've had a working relationship for so long." The couple often enjoy double dates with Ant and his wife Lisa Armstrong.Meanwhile, Ant is reportedly aiming to leave rehab in a month and fly to Australia to film I’m A Celebrity just six weeks later.Big D x." Dec was a notorious bachelor before meeting Ali.The couple tied the knot in August 2015 in Dec's home town of Newcastle.He was previously linked to former Pussycat Doll and I’m a Celeb contestant Ashley Roberts and dated Sky Sports presenter Georgie Thompson for two years before splitting in 2011.