Lorraine Kelly's two-word response as she learns Richard Madeley's real age

Richard Madeley left his Good Morning Britain co-host Susanna Reid and fellow presenter Lorraine Kelly gobsmacked during Wednesday's show.

Lorraine, 65, popped into the studio to preview her upcoming show, sparking a question from Susanna, 54, aimed at Richard: "What did you reveal to us this morning?"

A surprised Richard answered, "For the second time on the show this morning...", before sharing: "I'll be 69 in May!"

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Lorraine complimented him, "You're looking good!" with Susanna chiming in, "Doesn't he?" and Lorraine playfully adding in a two-word response, "It's ridiculous!".

However, a modest Richard responded, "I was just saying, honestly, I don't think so at all", reports .

He proceeded to explain, "I think it's a cultural generational thing now, most people, as long as they're reasonably healthy, approaching 70... don't look it anymore."

Elsewhere on Wednesday's , Richard halted the show briefly to reach out live on air to colleague .

The episode saw Richard and Susanna chatting with Melvin Odoom for the scoop on entertainment news, which included speculation about the Celebrity Traitors line-up apparently featuring their 57-year-old co-star Kate.

Melvin, 44, humorously remarked, "None of us have been able to get hold of Kate on the phone to confirm or deny this but I don't know about you guys, but I'm very suspicious and it makes me even more suspicious."

Susanna humorously remarked: "She'll make an excellent Traitor if we can't even get hold of her!" while Melvin suggested: "I think you need to send her a message right now!" Susanna cynically responded: "She'll neither confirm nor deny, I'm sure!" as Melvin insisted: "Let's do it anyway!".

As such, Richard whipped out his phone to message Kate during the live show as Melvin asked: "Have you done it?" with Richard replying: "Yeah..." and Melvin probing further: "Nothing yet?".

The background to this exchange is that Kate is said to have become part of the Celebrity Traitors cast, a new celebrity variant of the well-liked game show by the .

Kate is apparently poised to join figures like icon Stephen Fry, 67, and rugby star Joe Marler, 34, at Ardross Castle, .

Other stars rumoured for the line-up include Charlotte Church, Bob Mortimer, Alan Carr, Jonathan Ross, Joe Marler, Nick Mohammed, Tom Daley, David Olusoga, Niko Omilana, Mark Bonnar, Joe Wilkinson, , Clare Balding and Paloma Faith - to name a few.

Good Morning Britain continues on weekdays at 6am on ITV and ITV X.