London, England (CNN) -- Britain's opposition Labour Party was due to announce its new leader Saturday, four months after Prime Minister Gordon Brown resigned from the post when his party lost the election.
Brown's former foreign secretary, David Miliband, was in the running along with his brother, Ed Miliband. The brothers have been locked in a battle for the top spot for months.
They face competition from former Brown Cabinet members Ed Balls and Andy Burnham, and London member of Parliament Diane Abbott.
Whoever heads the party will lead the opposition to the current coalition government, led by Prime Minister David Cameron, of the Conservative Party, and Deputy Prime Minister Nick Clegg, of the Liberal Democrats.
Harriet Harman has been acting Labour leader since Brown left.
Voting for the new leader closed this week.
Whoever is elected will make their first major speech at the annual Labour Party conference, which opens in Manchester, England, on Sunday.
Oxford-educated David Miliband was one of the first to enter the race for Labour leader. He wrote the party's manifesto that helped it win the election in 1997, and was elected to parliament in 2001. He became foreign secretary in 2007.
CNN
