She suffered no serious injuries and was scheduled to return to the set later Thursday.
"There was an accident involving a rigged camera vehicle on the set of The Invasion Wednesday night in Los Angeles," Warner Bros. said in a statement Thursday. "Nicole Kidman was in the vehicle at the time of the accident and was taken to the hospital for evaluation. She was released shortly thereafter."
No other actors were involved. According to police, a total of eight people were brought to the hospital and later released. The studio said two crew members suffered minor injuries.
"The production took the appropriate steps following the incident to ensure the safety of the cast and crew," the studio said in the statement.
The accident occurred shortly before 12:25 a.m. in downtown Los Angeles. An ambulance was sent to the scene, but not needed.
"There were no life-threatening injuries," the Los Angeles Fire Department said in a statement. "They conducted a medical exam but the persons involved sought their own medical attention."
Kidman's husband, Keith Urban, was on set at the time, photos show. Earlier in the day, Kidman's children Isabella, 14, and Conner, 11, were on the set, but had left before the accident.