During the BBC's annual live show (November 17) to support the charity, it was confirmed that Kay contributed £5,067,847 to the fundraising total, with even more donations expected to come in.
The DJ ran from Leicester to Bolton – a distance of nearly 116 miles – over four days.
In the Children in Need studio, Vernon was speechless as the crowd got to their feet and presenter Alex Scott branded him "incredible" and "amazing".
After struggling to contain his emotion, he eventually found some words and thanked people for their kind generosity.
A clip was also shown of Vernon finishing his ultramarathon challenge at Bolton's Community Stadium, where he was greeted by his emotional parents.
Speaking to fellow Radio 2 DJ Zoe Ball after reaching the finish line, Vernon described the experience as "one of the most painful and joyous experiences I've ever had".
He added that he was "absolutely exhausted, absolutely spent, physically, mentally", before joking, "Is there anyone here who can replace a knee?"
BBC's Children in Need celebrations also included David Tennant's return as the Fourteenth Doctor in a Doctor Who minisode and EastEnders icons Cindy and Ian Beale (played by Michelle Collins and Adam Woodyatt) in a special edition of Race Across the World.
By the close of the live show, the total raised was £33,513,325.
Friday's BBC Children in Need aired live from MediaCityUK in Salford.
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