Harper was found unconscious backstage at the Ogunquit Playhouse in Maine on Wednesday night, and was rushed by ambulance to the hospital. A source close to the family tells ET that her family says she is now in a coma.
Back in 2013, when Harper was first diagnosed with terminal brain cancer, Bateman gave a heartfelt statement about the impact she’s had on his life.
"Valerie is someone that I've learned a great deal from. Not just comedically, but also in her ability to put whomever approached her, or worked with her, completely at ease with a laugh, and an energy that's intoxicating," he told ET at the time.
Harper spoke with ET in November 2014 about "cheating death" with her terminal cancer diagnosis.
"I feel wonderful," the actress says. "What luck! Here I am. The three months didn't prove to be correct. The cancer I have is quite rare and terminal and incurable. I'm the recipient of a great research project that has kept me alive."
"Brave, open and wants to share her love with everyone, meeting everyone after the show," Ogunquit Playhouse artistic director Bradford Kenney told ET. "And that's how we should think of our Valerie Harper."