Alexander Armstrong bent the rules slightly as he appeared on ITV's Celebrity Catchphrase.
He took part in the game, hosted by Stephen Mulhern, alongside celebrities Natasha Hamilton, from Atomic Kitten, and Jamie Laing, from Made in Chelsea.
While on the show, he kept in mind that any winnings would be going to charity as he broke the rules and helped his fellow contestants out.
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A picture of a knight in shining armour blowing his nose, with a thermometer danced about the screen.
Jamie guessed the catchphrase incorrectly and then Natasha buzzed in to try and answer but then froze, clearly unsure.
Before her time ran out, Pointless host Alexander whispered: "Knight fever."
She gigged slightly before repeating the answer that Alexander had given her.
Simon Mulhern said: "Do you know what the weirdest thing is? I could have sworn... First of all it was like you were doing ventriloquism and it came out like Alexander's voice."
She replied: "I didn't hear that."
The host continued: "Bizarrely, you've got it absolutely correct!" as she cheered and her charity total increased.
Fans at home were delighted with Alexander's helpful actions as they shared their thoughts on Twitter.
Stephen said: "Alexander giving her the answer #Catchphrase."
Another user said: "Good guy Xander just telling them now. #Catchphrase"
J said: "You're too nice, Xander #Catchphrase"
Becky said: "Loving Alexander Armstrong helping the others get more money for their charities #catchphrase"
He ended the show as he won £25,000 for his chosen charity.
Natasha earned £4,400 for her charity and Jamie earned £2,600 meaning that overall on the show a whopping £32,000 was earned.
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