"It has been such a subject of rumor and speculation over the past months, but I am not designing it," he told Women's Wear Daily.
"We will all know [on Friday] - and I thought I'd duck out of the 'possibles list' to give everyone 24 hours to place their final bets!"
The rumour mill went into overdrive back in January, when Pippa and Carole Middleton were spotted visiting Bruce Oldfield's Knightsbridge boutique.
At one stage, the British designer - a couturier to the late Princess Diana - was odds-on favourite to design the gown at 3/1.
But with Oldfield now officially out of the race, and Sophie Cranston stepping forward to deny her involvement last week, the shortlist is getting narrower by the minute...
Well, we'll find out in less than 24 hours!
Who's your money on? Let us know below.