The Red Or Black? hosts revealed that they still rely on each other for support after 23 years in the business and regularly get "star-struck" by other famous faces.
Asked if he would ever consider breaking up their double act, Ant told the Daily Mail: "No, I don't think so. If I was on my own going through everything - the fame, the working hard, I think it would get me down.
"Because there are two of us, there's always someone to talk to. It might be little things - we got out of a car the other day and bumped into Nick Hewer from The Apprentice, and when I turned to Dec later and said, 'Can you believe that?', he got it - he was as star-struck as me."
The pair also shared their hopes of having children in the near future, though Dec conceded that their television career may have impeded his goal of having seven little ones.
"I come from a family of seven, so growing up I always thought I'd like a big family," he said. "Maybe I'm lowering my sights from seven now. But yeah, a couple would be good."
Dec, who split with Sky Sports presenter Georgie Thompson in April, joked that he may be forced to call time on his relationship if the girl of his dreams took a dislike to Ant.
"It'd depend if she was really fit," he teased. "Then I'd have to say goodbye... or chuck [Ant] out of an aeroplane."
Red Or Black? premieres tonight at 7pm on ITV1.