The society girl, 39, revealed earlier this year that she wanted to get her nose – ruined by years of cocaine abuse – rebuilt for the ceremony on 29 April.
But sources claim she is yet to have it reconstructed and currently looks like a “boxer” whose face has been squashed in a fight.
Tara paid £6,000 for a huge operation in 2006 to rebuild the area between her nostrils, which had been destroyed by her former £400-a-day cocaine habit.
It is still bent to the right and needs more surgery to return it to its normal state.
Tara told an interviewer earlier this year: “If I can get my nose fixed for the wedding that would be ideal. I’m not sure it’s going to be possible but hopefully something can be done in time.
“I’m so paranoid about it. It’s something I’ve always wanted to have done but it needs a recovery time.
“I read somewhere last week someone said they want to vomit when they saw it.”