Josh Hartnett has been discharged from Los Angeles' Cedars-Sinai Medical Center, five days after he was admitted suffering a gastrointestinal disorder.
The 'Black Hawk Down' star checked into the hospital after a "flare-up" of an ongoing stomach problem that first affected him when he was performing on London's West End stage last year.
Hartnett's publicist reveals the actor has undergone tests all week - but doctors have yet to properly diagnose his condition.
Susan Patricola told Usmagazine.com: "He has had a lot of testing. They released him, and they are trying to figure out what it might be. He is fine."