By Michael Ausiello
Updated April 07, 2009 at 12:00 PM EDT

If Grey’s Anatomy boss Shonda Rhimes is trying to win me back over after that whole Izzie-Denny-ghost-sex debacle, mission accomplished!

Sources confirm to me exclusively that Rhimes has tapped two of my favorite actresses on the planet, Everwood‘s Debra Mooney and Gilmore Girls‘ Liza Weil, to guest star in the show’s two-hour season finale on May 14.

Mooney will play mom to Kevin McKidd’s emotionally tormented Owen, while Weil will appear as a cancer patient who crosses paths with Izzie.

Interesting piece of trivia: Weil, whose sublime work as Rory’s acid-tongued BFF on Gilmore turned many a frown upside down, has ties to Rhimes’ other show, Private Practice; her real-life husband is the equally awesome Paul Adelstein (Cooper).

All’s (almost) forgiven, Shonda!