Joe and Victory smile on as Wendy and Nico are busy toasting to the newly engaged couple. We couldn't be happier!

Mark, Addison and Arizona tend to Sloane. Hopefully his daughter makes it.

A promotional photo from the May 1, 2008 episode of Grey's Anatomy, entitled "Piece of My Heart." Dr. Addison Montgomery (Kate Walsh) and Dr. Derek Shepherd (Patrick Dempsey) share a lighter moment. They used to be married, can you believe it?

Elevator? More like awkward scenario!

Archer and Addison Montgomery in a scene from "Before and After," from the fifth season of Grey's Anatomy.

Kate Walsh (Addison) is back on Grey's Anatomy, but still on Private Practice, of course. She stars on one Shonda Rhimes series after getting her start on the other.

Look who is returning on the Grey's Anatomy episode "If/Then." We get to see Addison back in Seattle Grace.

It won't be so tough for Addison to get over McDreamy and McSteamy over at Private Practice.

Addison and a very pregnant Miranda discuss.

A promotional photo from the May 1, 2008 episode of Grey's Anatomy, called "Piece of My Heart." Dr. Addison Montgomery (Kate Walsh) returns from L.A. Nice!

Who's that in the shower?

Addison and Derek used to be married. Now he's going to get engaged to Meredith, and all is well between the two of them.