The paper reports that Katie – aka glamour model Jordan – has invited the troupe to kick off the dancing at the party with a special routine.
And Alex is set to join them on the dancefloor after they have performed their opening number.
The cage fighter – who won Celebrity Big Brother earlier this year – is reported to be in rehearsals with the group.
“Katie loves Diversity so Alex is chuffed to be working with them,” a source told the paper. “They’ve arranged to lead the first dance, then Alex will dance with them.”
However the 34-year-old’s friends aren’t so keen on the idea. “Nobody’s denying Diversity are brilliant at what they do,” one said. “But urban street dance isn’t the most romantic choice for a wedding. And surely bride and groom should dance with each other at their wedding?”
The couple’s wedding blessing will take place on July 3, four months after they officially married in Las Vegas.
It will be shown on ITV2 in a three-part series called Katie And Alex: For Better Or Worse, which will also feature footage of the couple on honeymoon.