'Ugly Truth' costars Katherine Heigl and Gerard Butler reportedly evacuated the Four Seasons hotel in Beverly Hills following a bomb scare.

ET confirms that the Four Seasons evacuated the facility and the LAPD were called out to investigate.

Heigl and Butler were there promoting their film when they were forced to vacate the hotel, along with 400 other guests, People magazine reports.

According to sources of the magazine, the celebrities mingled with the fans outside the luxury hotel for two hours and even posed for pictures with the AC Milan soccer team. They eventually retreated to restaurant Il Cielo, People reports.

'The Ugly Truth' hits theaters July 24.