The X Factor judge met Prince Charles recently and is set to launch a charity foundation in aid of The Prince's Trust.
Although speaking to British Hello! magazine, Geordie Cheryl said that she has not received an invite to the royal nuptials on April 29.
The 27-year-old said: 'I'm going to ask Prince Charles where it is. I think it must have got lost in the post.'
Cole also went to praise the Princess-to-be.
She said: 'I love Kate's style, she dresses like a princess. I've met William a couple of times, but never Kate. I can't wait for the wedding - hopefully I'll be watching from an aisle.'