Newly engaged Scarlett Johansson showed off her round, white diamond ring from Ryan Reynolds at the Metropolitan Museum of Art's Costume Institute Gala in New York City on Monday.

Wearing an ivory D&G dress, the actress, 23, was escorted by designers Domenico Dolce and Stefano Gabbana. (Reynolds, 31, was in Boston filming the aptly titled comedy The Proposal.)

On her way to the bash, she hugged Aussie actress Naomi Watts, who couldn't help but notice Johansson's glow.

"You look gorgeous!" Watts told her.

Though Johansson skipped press, her colleagues couldn't stop gushing.

Her Lost In Translation director, Sofia Coppola, wished the star "congratulations.

"That's great news!" she told Usmagazine.com.

"I'm really excited for her!" actress Amanda Peet told Us. "They're both genius actors, and she's friend with my friend. Yay!"

Added designer Marc Jacobs (who has worked with the actress), "I'm really happy for her. If she's in love, that's great. I just hope that she's happy and wish her all the best."

Not everyone was psyched the actress was getting hitched.

"Damn, I'm very disappointed!" Gossip Girl's Ed Westwick joked to Us Weekly. "I missed my chance. That boat has sailed."