The PM asked Michael Fabricant if he was on the show as the celebrity or the date in a light-hearted answer to his question at PMQs.
The House of Commons heard the news on Wednesday when Mr Fabricant raised Birmingham's bid to host the Commonwealth Games.
MP Michael Fabricant will be looking for love on Channel 4 programme Celebrity First Dates, the prime minister has revealed.
Having titillated Tory MPs with that nugget, she then brought the energy levels back down again with a joke: "What I'm not sure about is whether my honourable friend is the celebrity or the first date".
Theresa May teased one of her senior backbenchers in the Commons today after revealing he would appear in Celebrity First Dates.
The celebrity version of the popular reality show has previously included television presenter Esther Rantzen, EastEnders actor Richard Blackwood, weather presenter Sian Lloyd and Vamps lead singer.
Mr Fabricant said he was taking part to raise money for Cancer Research, which would receive his £25,000 fee.
Mr Fabricant was first elected Conservative MP for Lichfield, Staffordshire, in 1992.