Credits:

• Ellen Pompeo as Dr. Meredith Grey [ 1-19, recurring 19- ]
• Chandra Wilson as Dr. Miranda Bailey
• James Pickens Jr. as Dr. Richard Webber
• Kevin McKidd as Dr. Owen Hunt [ 5- ]
• Kim Raver as Dr. Teddy Altman [ 6-8, 14- ]
• Camilla Luddington as Dr. Jo Wilson [ 10-, recurring 9 ]
• Caterina Scorsone as Dr. Amelia Shepherd [ 11-, recurring 10 ]
• Jake Borelli as Dr. Levi Schmitt [ 16-, recurring 14-15 ]
• Chris Carmack as Dr. Atticus 'Link' Lincoln [ 16-, recurring 15 ]
• Anthony Hill as Dr. Winston Ndugu [ 17- ]
• Scott Speedman as Dr. Nick Marsh [ 18-19, recurring thereafter ]
• Alexis Floyd as Dr. Simone Griffin [ 19- ]
• Niko Terho as Dr. Lucas Adams [ 19- ]
• Adelaide Kane as Dr. Jules Millin [ 19- ]
• Harry Shum Jr. as Daniel 'Blue' Kwan [ 19- ]
previous:
• Justin Chambers as Dr. Alex Karev [ 1-16 ]
• Patrick Dempsey as Dr. Derek Shepherd [ 1-11 ]
• Sandra Oh as Dr. Christina Yang [ 1-10 ]
• Sara Ramirez as Dr. Callie Torres [ 3-12, recurring 2 ]
• Jessie Williams as Dr. Jackson Avery [ 7-17, recurring 6 ]
• Sarah Drew as Dr. April Kepner [ 7-14, recurring 6 ]
• Jessica Capshaw as Dr. Arizona Robbins [ 6-14, recurring 5 ]
• Kelly McCreary as Dr. Maggie Pierce [ 11-19 ]
• Eric Dane as Dr. Mark Sloan [ 3-8 ]
• Giacomo Gianniotti as Dr. Andrew DeLuca [ 12-17 ]
• Jason George as Dr. Benjamin Warren [ 12-14, recurring 6-11 ]
• Martin Henderson as Dr. Nathan Riggs [ 12-14 ]
• Katherine Heigl as Dr. Isobel "Izzie" Stevens [ 1-6 ]
• Chyler Leigh as Dr. Lexie Grey [ 4-8, recurring 3 ]
• Jerrika Hinton as Dr. Stephanie Edwards [ 10-13, recurring 9 ]
• T.R. Knight as Dr. George O'Malley [ 1-5 ]
• Isaiah Washington as Dr. Preston Burke [ 1-3 ]
• Kate Walsh as Dr. Addison Montgomery [ 2-3, recurring otherwise ]
• Greg Germann as Dr. Tom Koracick [ 16-17, recurring 14-15 ]
• Richard Flood as Dr. Cormac Hayes [ 17-18, recurring 16 ]
• Midori Francis as Dr. Mika Yasuda [ 19-20 ]
• Brooke Smith as Dr. Erica Hahn [ 4-5, recurring previously ]
• Gaius Charles as Dr. Shane Ross [ 10, recurring previously ]
• Tessa Ferrer as Dr. Leah Murphy [ 10, recurring previously ]