Isaiah Washington
Shonda Rhimes
Katherine Heigl
Sandra Oh
Justin Chambers
Ellen Pompeo
Sara Ramirez
Eric Dane
Taye Diggs
Nathan Lane
Chandra Wilson
Kate Walsh (actress)
Scott Speedman
Jesse Tyler Ferguson
Allison Janney
Carrie Preston
Audra McDonald
Greg Germann
Sarah Drew
Chyler Leigh
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T.R. Knight was a member of the acting company of Minneapolis' Guthrie Theater. imdb.com