Maria Menounos Shows Off Her HUGE New Engagement Ring — See the Pics!

Maria Menounos' engagement ring is nothing short of stunning!

Just hours after the 37-year-old E! News host became engaged to her longtime boyfriend, Keven Undergaro — they've been dating for 19 years! — Maria showed off her huge new bauble while out and about in NYC on Wednesday, March 9.

Maria showing off her engagement ring on March 9.

According to Us Weekly, Maria's ring is "an ideal round brilliant-cut center stone set in a halo setting boosted with 220 accent diamonds."

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"Keven chose to add personal elements to the ring by including a Signature Stone hidden underneath," the ring's designer, Jean Dousset, said. "The choice of color and origin of the stone adds thoughtful detail only he and Maria will know and see."

https://www.instagram.com/p/BCv1V42MwUP/

Kevin proposed while Maria was appearing on Howard Stern's SiriusXM radio show to promote her new book, The EveryGirl's Guide to Cooking, on Wednesday.

Congrats to Maria and Keven on their surprise engagement!