Actor Colin Farrell looked slim and toned as he showed off his new ultra-thin physique on the beach in Malibu after his dramatic weight loss for a film role.

Despite his slender frame, the 32-year-old appeared tanned and healthy as he jogged along the beach yesterday.

The Irish heart-throb looked every inch the beach Adonis with his long hair, Celtic tattoos and a sand-covered six-pack.

Slimline: Colin Farrell looking thin as he runs up the beach after having a swim in Malibu

Farrell has dramatically shed pounds for his role in the upcoming movie, Triage, in which he plays a war photographer.

It is believed he has lost as much as three stone for the Bosnian film, in which he stars alongside Spanish actress Paz Vega and British actor Christopher Lee.

The thriller tells the story of a war photographer who loses his best friend during a harrowing assignment in war-torn Bosnia during the early 1990s.

Disappearing act: Farrell looking rather more portly in 2005 (left) and with his new slim-line look (right)

The Irish actor is no stranger to changing his physique for film roles. He bulked up play the role of Alexander in the 2004 Oliver Stone movie and was at the peak of physical condition in S.W.A.T.

A bulked-up Colin Farrell in 2003 film S.W.A.T.