'Grey's Anatomy' star Kate Walsh has announced her engagement to boyfriend Alex Young, a Fox studio exec. The big news came to press gathered at Lincoln Center for ABC's upfront presentation for the new Fall season.

"It happened a few days ago. And that’s all I can say," she beamed, flashing US Weekly her engagement ring. "I’m on cloud nine.”

The couple were first spotted getting cozy on April 22 at Mustard Seed Restaurant in Hollywood. “They were holding hands, nuzzling each others necks, kissing, and were really into each other," a source tells Us.

Walsh and Young then went public with their whirlwind romance at a Barack Obama fundraiser in Los Angeles.

An engagement isn't the only thing that the actress has to smile about these days. ABC announced late last week that Walsh's new show, Private Practice (the Grey's Anatomy spin-off starring Walsh's character, Addison Montgomery Sheperd), had been picked up for a full season and will premiere this fall on Wednesday nights at 9 p.m.

Congrats to Kate and Alex!

Labels: Grey's Anatomy, Kate Walsh