Holly Willoughby and Ben Shephard were left in fits of uncontrollable laughter after Holly spoke about 'willy wanging' instead of 'welly wanging' on live television.
The This Morning presenters could hardly contain themselves as the star made the verbal blunder during the live show.
The duo were re-enacting a moment from a 2015 episode in which Holly accidentally smashed an ornamental pineapple with a Wellington boot during a welly wanging segment.
This time, she threw a golden pineapple across the studio and tricked viewers into thinking she had broken it again.
Ben then asked her: "Since that day, a year ago today, have you ever hit anything that you've been throwing at?"
She replied: "Funnily enough, I've never willy wanged since then."
The TV stars and the crew in the studio burst out laughing, with neither Ben nor Holly able to speak for more than 15 seconds.
Ben eventually steeled himself and joked: "I, however, haven't stopped!"
Holly said welly wanging "is not easy to say", before suggesting they "move on" from her faux pas.
Ben is filling in for regular This Morning presenter Phillip Schofield, who is on holiday this week.