Actor Colin Farrell has been admitted to a treatment centre for exhaustion and addiction to prescription drugs, his spokeswoman has said.
Farrell rose to fame on the British TV series Ballykissangel
The 29-year-old was admitted to the clinic after completing filming on the movie remake of TV show Miami Vice, said publicist Danica Smith.
"We ask that the press respect the privacy of Mr Farrell and his family." No further details were released.
The Irish actor has appeared in films such as Alexander and Minority Report.
He rose to fame on British televison screens in the long-running series Ballykissangel, but came to Hollywood's attention in the Joel Schumacher film Tigerland, in 2000.
However, despite starring roles in action films SWAT, Hart's War and The Recruit, opposite Al Pacino, Farrell's bid to establish himself as leading man material in Alexander was deemed a critical failure.
The Dublin-born actor has a reputation for hell-raising.
Over the years Farrell has established a bad boy image in Hollywood, with tales of strippers, boozing and foul language hitting the newspapers.
Earlier this year, he sued a former girlfriend for allegedly trying to sell a tape of them having sex.
A Los Angeles judge granted a restraining order banning model Nicole Narain from selling the video.
The actor returns to the big screen in the Terrence Malick drama The New World, due to be released in the US on Christmas Day.
Farrell recently completed filming on the movie version of TV detective show Miami Vice. In the film he plays "Sonny" Crockett, opposite Oscar winner Jamie Foxx as Crockett's partner, Tubbs.