Tomb Raider star Angelina Jolie has pledged $5m (£3.2m) to set up a wildlife sanctuary in Cambodia.
Angelina Jolie is known for her humanitarian work
Jolie will donate the money over a period of 15 years, a senior charity official said on Friday.
The sanctuary is in a north-west region of the country formally run by the communist Khmer Rouge regime and covers 49,500 acres of forest land.
The actress fell in love with Cambodia while filming the first Tomb Raider action movie in which she stars as Lara Croft.
She is also known for her work as a goodwill ambassador for the UN and for making adhoc donations, including giving £50,000 to a UK children's hospital after they treated her son.
The Cambodian charity Cambodian Vision in Development
said Jolie had already paid a first instalment of $350,000 (£223,000) to get the forest project started.
"This is a great opportunity for us to restore deforested areas and protect wildlife to ensure local communities will not destroy them," a spokeswoman said.
Up until five years ago, the land was still controlled by remnants of the Maoist Khmer Rouge - the regime responsible for the deaths of an estimated 1.7 million people in the 1970s.
Jolie's money will also go towards helping war veterans and amputees rebuild their lives, the charity said.
Jolie, the daughter of actor Jon Voight, won a best supporting actress Oscar in the 2000 film Girl, Interrupted.
She has since achieved global fame as the star of the hi-tech film version of the Tomb Raider computer game.
The second Tomb Raider movie is due out later this year.
Jolie was chosen by UN to be a goodwill ambassador because of the interest her popularity would bring to the organisation's aid projects.
She has visited refugee camps in Sierra Leone,
Pakistan and Cambodia.
Jolie's son Maddox is an adopted Cambodian-born boy.
Jolie and her then husband, actor Billy Bob Thornton, spent months seeking permission to adopt the child and bring him back to the US.
The couple split up a few months later.