When Pippa Middleton wore "that dress" to the Royal Wedding three years ago, it created an overnight fashion sensation.
Interested in ?Add as an interest to stay up to date on the latest news, video, and analysis from ABC News.
And at the Women in Advertising and Communications dinner in London last night, Middleton admitted she remembers it well.
"As I have found out, recognition has its upside, its downside, and -- you may say -- its backside," she told the crowd, Glamour reports.
The Duchess of Cambridge's younger sister, 30, added, "In retrospect, it fitted a little too well," she said of the dress designed by Alexander McQueen designer Sarah Burton.
She added that she was so nervous for her sister's wedding to Prince William that she didn't sleep for a couple nights before.