07/16/2009 at 01:00 PM EDT
Mischa Barton will skip the premiere Thursday night of her movie Homecoming
, a day after she made a medical call to Los Angeles police.
The 23-year-old actress, who two months earlier said that she was happy and healthy
, called police at 3 p.m. Wednesday with a health problem, LAPD Officer April Harding confirms to PEOPLE. (Access Hollywood
first reported the story.)
"We assisted her with a medical issue and removed her from her home," says Harding. She adds that no paramedics were involved and no arrests were made, but confidentiality laws prevent her from revealing details about Barton's condition.
The star's Craig Schneider, tells PEOPLE exclusively that police were only needed to protect the former O.C.
star from the media as she was transported to her doctor.
"Police were involved due to Ms. Barton's celebrity status, to safely transfer her to medical treatment as per doctor's orders," Schneider tells PEOPLE, adding that Barton is now "okay and resting."
Austin Stark, one of Homecoming
's producers, tells PEOPLE, "There were some medical problems. She's not able to travel, as far as I know." He says he's disappointed Barton will miss the indie film's premiere "because she did a great job" in her role as an unscrupulous homecoming queen.
Director Morgan J. Freeman and producers Austin Stark, Benji Kohn and Bingo Gubelmann of Paper Street Films are still expected to attend.
With reporting by DAVID CAPLAN, PAUL CHI and LISA INGRASSIA