Prime Minister Tony Blair's (search) eldest son will intern for a U.S. congressional committee, Blair's office said Sunday.

Euan Blair (search), 21, will take a short, unpaid internship with the House Rules Committee, a spokesman for the prime minister's office said. He did not specify when the internship would start or how long it would last.

The Rules Committee, which plays a key role in the U.S. legislative process, is chaired by Rep. David Dreier (search)a, R-Calif.

The Sunday Telegraph newspaper reported that Dreier would mentor Euan Blair, whose father leads Britain's traditionally left-of-center Labour Party. It said the internship would last three months.

The prime minister's son also hopes for an internship with a Democratic congressman, the spokesman added.

Tony Blair asked the British Embassy in Washington to get involved in the internship arrangements "for obvious reasons," the spokesman said without elaborating.

A stint working as an intern in Congress or the White House is highly prized by young Americans with political ambitions, and competition for such placements is intense.

Euan Blair has just completed an undergraduate degree course in ancient history at Bristol University, a well-regarded college in southern England. He is due to graduate this summer, the prime minister's spokesman said.