Katharine Hepburn won’t be released from the hospital until tomorrow at the earliest because her doctor wants to get her walking first, officials said.

“Obviously, after four days, her muscles need to be stretched, and [her doctor] felt it would be more productive to keep her in the hospital until she could get some exercise and they could monitor her condition,” Hartford Hospital spokesman James Battaglio said.

The 94-year-old multiple Oscar winner was admitted to the hospital last Wednesday.

Battaglio said Hepburn’s condition is still good, and said keeping her is a “cautionary measure.”