Pippa Middleton
is the "butt" of her own joke!

It's been three years since Kate Middleton's younger sister -- and her backside -- turned heads in the infamous figure-hugging Alexander McQueen bridesmaid dress at the royal wedding.

Speaking at the Women in Advertising and Communications dinner in London on Tuesday, the brunette beauty joked about being famous for her enviable rear.

"As I have found out, recognition has its upside, its downside and -- you may say-- its backside," the 30-year-old told the audience. 

The "Celebrate" author said she was just "glad it fitted" at the time of the high-publicized wedding, but added, "In retrospect, it fitted a little too well."

This isn't the first time that Pippa has addressed her backside's notoriety.

"It is a bit startling to achieve global recognition before the age of 30 on account of your sister, your brother-in-law and your bottom," she told The Mail On Sunday in 2012. "One day I might be able to make sense of this. In the meantime I think it's fair to say that it has its upside and its downside."

We love that she is willing to poke fun at herself -- and her butt!

What do you think of her candid comments? Tell toofab in the comment section below, and click "Launch Gallery" above to see more photos from the royal wedding.