Laurence Llewelyn-Bowen will get a second chance at the £1m jackpot on ITV1's Who Wants To Be A Millionaire? after a mix-up over a question.
Laurence Llewelyn-Bowen and wife Jackie's prize will go to charity
The former Changing Rooms star and his wife, Jackie, had reached the final level in a special Valentine's charity edition of the quiz show.
He appeared to give the wrong answer to a question about the English translation of the US's Latin motto.
But programme maker Celador has admitted the question was "ambiguous".
The couple will now be given a second chance to take the show's top prize with a second £1m question.
During filming for the show - which will be shown on 11 February - the pair had answered the £500,000 question with ease.
They then faced final question, which was: Translated from the Latin, what is the motto of the United States?
They had to choose from the following answers: A) In God We Trust, B) One Out Of Many, C)All As One , or D) Striving Together.
Llewelyn-Bowen, who had sailed through the previous questions with ease, replied: "It's In God We Trust."
But the answer was One Out Of Many and the £1m prize was lost, sending the couple's winnings for their chosen charity - Shooting Star Children's Hospice plummeting to £32,000.
In God We Trust is the official motto of the United States, adopted on 30 July, 1956, and appears on US currency - but it is not a translation from the Latin.
One Out Of Many is another US motto and is a translation from the Latin E Pluribus Unum. It has appeared on the country's Great Seal since 1782.
A Celador spokeswoman said: "We are not satisfied that the question they went out of the game on meets our usual high standards of fair game play, so we have invited them back to resume the game with a new question at the same level."
Llewelyn-Bowen, who presents BBC One's Holiday programme, said: "We feel as if we've been reprieved from the firing squad. How unusual is it to get a second chance in life?
"But as far as we are concerned, this charity really deserves this so we're clearing our diaries and going back for another onslaught, and we're grateful to Celador for the opportunity."
The US Embassy said neither of the answers was wholly correct.
"In God We Trust is the motto of the United States, so that part of the answer is right but it wasn't translated from Latin. So he's right and he's wrong," a spokeswoman said.
The couple are the first celebrity contestants to reach the show's £1m question.