"UNHCR Goodwill Ambassador Angelina Jolie arrived in Pakistan today to meet people affected by the floods and to highlight the continued urgent need for help," the agency said in a statement.

Jolie, the 34-year-old actress and roving envoy for the UN High Commissioner for Refugees, would be traveling to affected communities in the northwest and would meet those involved in the relief efforts, it said.

This is the fourth visit by Jolie to Pakistan since she became a UNHCR goodwill ambassador in 2001.

Last week Jolie released a video message appealing for greater public support for Pakistan's relief efforts, and she has herself donated 100,000 dollars to the flood appeal.

The UNHCR is providing relief aid including shelter materials to those displaced by the disaster, which has killed 1,760 people by the official toll.