The mystery has been solved. Kate Walsh is dating Alex Young, a production co-president at 20th Century Fox.
The Grey's Anatomy star, as reported in this week's issue of People magazine, claims her new man as "a great guy" while refused to make public his name.
"He's a hotshot," People quoted a friend as saying. "But Alex also has substance. He's a good guy."
Kate first stepped out with Alex for an April 21 lunch date at the Mustard Seed Cafe in Los Angeles and then again at an April 28 fund-raiser for Barack Obama also in L.A.