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 Jillian Armenante Arlene Perkins Guest Star Sharon Leal Sonya Nichols Guest Star Agnes Bruckner Heather Parker Guest Star Siena Goines Claudia Jenkins Guest Star Jay Harrington Dr. Wyatt Lockhart Guest Star Hailey Sole Betsey Guest Star Gayle James Pregnant Woman Guest Star Joshua Rush Will Guest Star Shonda Rhimes Executive Producer Betsy Beers Executive Producer Marti Noxon Executive Producer Mark Gordon Executive Producer Mark Tinker Executive Producer Fred Einesman Writer Kate Woods Director