Kelly Osbourne shows off her engagement ring

kelly-osbourne-engagement-ring.jpg

Kelly Osbourne gave the world a glimpse at her new engagement ring ... though the first look was actually on accident.

While posting a photo of her new, edgy manicure to her instagram on Saturday (July 20), the newly engaged star's large and glittery engagement ring could easily be seen on her left ring finger ... and oh man, is it a rock!

Set to marry her boyfriend of two years, Matthew Mosshart, Osbourne recently revealed to Hello! Magazine that she custom designed her own ring to look like an earring that her father, Ozzy Osbourne, used to wear when she was a kid. 

Photo/Video credit: Kelly Osbourne/Instagram