Police in Los Angeles were called by someone stating that a bomb was implanted at the Four Seasons Hotel, where Katherine Heigl and Gerard Butler were staying.
For two hours, the stars and 400 other hotel guests were evacuated while the search for a bomb began.
Witnesses told People magazine that Butler was spotted hanging out at Il Cielo restaurant with some of the players from the AC Milan soccer team.
No suspicious package was found, and the hotel guests were allowed back into their rooms.