'I think my whole body was very, very sick,' the actress said.
‘Grey’s Anatomy’s 400th episode and season finale airs May 26 on ABC.
The two-hour season 18 finale airs Thursday at 8 p.m. ET/PT on ABC.
The medical drama also celebrates its milestone 400th episode Thursday.
‘Grey’s Anatomy’ season 18 finale airs Thursday on ABC.
ET spoke to Pompeo at 'Grey's Anatomy's 400th episode red carpet earlier this month.
Ellen Pompeo chats with ET's Cassie DiLaura at a celebration for 'Grey's Anatomy's 400th episode.
Which shows are coming back and which ones are saying goodbye? Here's ET's annual list of all the TV renewals and cancellations!
Jesse Williams stopped by 'Watch What Happens Live With Andy Cohen' on Monday night.
The former series regulars will return for the season 18 finale.
Eric Dane chats with ET at HBO's 'Euphoria' FYC event in Los Angeles.
Heigl previously spoke out against the working conditions on the medical drama.
News recently broke that Kate Walsh is set to reprise her role on the medical drama.
Shonda Rhimes chats with ET at the grand opening of the Rhimes Performing Arts Center in Los Angeles.