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Grace Kelly, Kate Middleton

Joseph McKeown/Getty Images; AP Photo/Martin Meissner

William & Kate's Royal Wedding

OMG! The world let out a collective gasp as Kate Middleton unveiled her stunning wedding dress by Alexander McQueen's Sarah Burton.

The bride didn't let us down.

Then our next reaction? That it resembled another famous wedding gown. And you know we're not talkin' Princess Diana's '80s masterpoof.

Kate's gown looks strikingly similar to Grace Kelly's iconic dress...

Like the late actress's gown, Kate's is long sleeve and lace—though the new princess did show a small but tasteful amount of skin with her deep V-neck while the screen legend covered up.

Both ladies also opted for waist-cinching bodices and voluminous skirts to show off their gorgeous figures, their trains were dramatic but not over-the-top, and they both sported short veils.

Although there was no mention of Kelly on the official royal wedding website, we have to wonder if Kate was inspired by the classic style.

"Undoubtedly, Grace Kelly was Kate's (and Sarah Burton's) inspiration for her gown," Fashion Police host and celeb stylist George Kotsiopoulos told us. "Fashion is derivative and always takes inspiration from past icons."

He continued, "The dress is definitely safe, but totally appropriate for this occasion. With a gazillion people watching, this is not the time to have a Demi Moore or Kim Basinger 'design your own dress' moment."

What do you think, does Kate's dress look a lot like Grace's?

WATCH: See Kate's electric arrival again!