New York, New York - What a wonderful surprise! Riverdale actor Casey Cott got engaged to his girlfriend.

He announced his exciting news on his Instagram account on Saturday in an adorable selfie post with the love of his life.

In the photo, the young couple is beaming with joy as the pretty brunette proudly shows her sparkling ring to the camera.

The 28-year-old didn't write anything in the caption. But the three ring emojis were enough of a hint to his delighted fans.

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The comments section was immediately flooded with thousands of heart emojis and congratulations. Even some of Casey Cott's Riverdale co-stars, including Camila Mendes and Lili Reinhart, could hardly contain their joy.

"I'm so happy for you both," Mendes wrote, and Reinhart kept it short but sweet with "Congratulations."

The 28-year-old became famous for his role as Kevin Keller in the hit series Riverdale, which returned for a fifth season in 2020.

And who is his adorable future wife? That's still a mystery. Although she shows up in a few pictures with Casey on his Instagram account, she is never tagged and he hasn't revealed her identity yet.

It seems like Casey Cott doesn't want to share his new fiancé with anyone or anything.