Kate Walsh Dr. Addison Montgomery Actor Tim Daly Dr. Pete Wilder Actor Audra McDonald Dr. Naomi Bennett Actor Paul Adelstein Dr. Cooper Freedman Actor Kadee Strickland Dr. Charlotte King Actor Christopher Lowell William "Dell" Parker Actor Taye Diggs Dr. Sam Bennett Actor Amy Brenneman Dr. Violet Turner Actor Brian Benben Dr. Sheldon Wallace Guest Star Sharon Leal Sonya Nichols Guest Star Marin Hinkle Beverly Guest Star Erik Palladino Mitch Thompson Guest Star Emma Caulfield Leanne Thompson Guest Star Leonard Roberts Ryan Guest Star Alexandra Lydon Eleanor Guest Star Grant Show Dr. Archer Forbes Montgomery Guest Star Bob Jesser Paul Guest Star Erica Luttrell Sasha Guest Star Jon Powell Greg Guest Star Renee Faia Woman Guest Star Wendy Douglas Carol Guest Star Shonda Rhimes Executive Producer Betsy Beers Executive Producer Marti Noxon Executive Producer Mark Gordon Executive Producer Mark Tinker Executive Producer Steve Blackman Writer Michael Zinberg Director