Admittedly they're not going to marry each other (now, imagine THAT), but he will officiate her marriage to George Kay next year.
Speaking of her nuptials, our Kerrah told OK magazine: "We’re thinking it will be in August and David Gest is going to marry us.
"'The Big Reunion' lot will be there and Blue will sing as well as Kevin Simm from Liberty X. He has such an amazing voice," she added.
Kerry and George - who are expecting a baby together - had put their wedding on hold after the Atomic Kitten singer was made bankrupt for the second time earlier this year.
She told New! magazine at the time: "We can’t afford it. It’s not a priority – as long as we’re together, that’s the main thing."