A quartet of doctors are officially checking in to Grey's Anatomy.

ABC announced today that Camilla Luddington (pictured), Gaius Charles, Jerrika Hinton and Tessa Ferrer have been upgraded to series regular status for Season 10 of the hit drama.

They all came on board last year in the roles of interns Jo, Shane, Stephanie and Lea, respectively.

Tina Majorino was NOT included among the promotions, but the actress isn't exactly starved for work. She has committed to TNT's Legends and will appear in the Veronica Mars movie.

Season 10 resumes in September, with - SPOILER ALERT!!! - the fate of Chief Webber in the balance following a shocking Grey's Anatomy Season 9 finale.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.