“We’re always working with new material, and it’s so full of energy that we always enjoy it, and I think audiences can tell that,” says Tucker, 39.

“Your comedic skills come into play and you try and make it as different as possible year after year.”

“We try and be as inventive as we can, and try to put each other off with daft walks or silly faces,” adds Keast, 40.

“But we’ve been working together for so long now that we can pretty much tell what each other is going to do.

“As well as performing on stage together, we’ve played as a rhythm section for many years.”

Fans may recognise some elements of the show, he adds.

“We’ve included some bits that people might have seen before,” he says mysteriously.

“I normally pick on one person and sit on their lap,” butts in Tucker, 39.

“It happened by accident a couple of years ago and we built it into the show.

“The audience is different every night so the performances always change because their response is never the same.”

His eight-month-old baby boy, Ned, is just a bit too young to watch his dad play Dottie Dolittle this Christmas.

Charlie, Keast’s seven-year-old, has his own ideas, however.

“I asked him recently, ‘Do you know what daddy does for a living?’,” recalls the actor.

“He answered, ‘funniness’.”

DICK WHITTINGTON is at the Everyman Theatre from November 28 - January 23. Tickets £10.50-£21, family tickets £32-£70.