Tamzin Outhwaite left Phillip Schofield and Holly Willoughby in hysterics as she revealed a massive blunder she made when she first joined EastEnders almost 20 years ago.
The actress has recently returned to the BBC soap after 15 years, but she left her mark then in more ways than one.
Speaking on This Morning, Tamzin said: "I joined EastEnders in the August and that Christmas I’m really busy, on set 12/14 hours a day sometimes and so I took all my cards into work.
"And they all had stamps on, some were going to Germany, some to America and I thought, I’ll kill two birds with one stone, I’ll go down and film this scene down on the lot and I’ll put my Christmas cards in the letter box.
"So I put them all in and then I asked one of the prop guys: ‘How often do they collect from there?’
"And he looked at me like ‘What do you mean?’ And I said, ‘The post box, is it once a day or once a week? Will they get there in time?’
"He went, ‘It’s not real’.
"I couldn’t get them out, there’s not even a thing on the back; what was I gonna do? Smash it down to get the Christmas cards back?"
As Phil and Holly burst into fits of giggles, Tamzin confirmed: "They’re still in there!"
Tamzin also confessed she’d love to star in Dancing On Ice.
Will we see her on the show next year?
*This Morning is on ITV1 weekdays at 10.30am