"She was released and is doing much better," spokeswoman Leslie Sloane Zelnick said Wednesday.
Lohan, 18, was admitted with a 103 degree fever, suffering from headache and exhaustion, USA Today reported. She had been feeling sick since Oct. 18.
The illness forced a production halt on her Disney film, "Herbie: Fully Loaded." Lohan is expected back on the set Monday, other reports said.
Celebrity Breakups and divorces of 2014 [PHOTOS]