John Blanchette, publicist for Gabor, said the actress's husband, Prince Frederic Von Anhalt, made an emergency call at 10:42 a.m. PDT and Gabor was taken to Ronald Reagan UCLA Medical Center by ambulance, the Los Angeles Times and KTLA-TV reported. Von Anhalt said Gabor, 93, was "unresponsive" before the call was made.
The spokesman said it was possible Gabor might be able to go home Tuesday night, the Times reported.
Gabor has been hospitalized several times since breaking a hip in a fall at her home in mid-July. Her publicist said she had returned home from the hospital two weeks ago, saying she wanted to spend her final days there. Before going home she had asked to see a priest, who administered last rites.
Gabor, a sex symbol in the 1950s and '60s, has been partially paralyzed since a 2002 car accident.