Born in Scotland, Gordon Brown is often referred to as "a son of the manse".
"All I believe and all I try to do come from the values that I grew up with - duty, honesty, hard work, family and respect for others," as he himself puts it.
Politics has always been his passion. By the age of 12, he had already pushed Labour Party leaflets through the letter boxes of neighbours' homes. He became a Labour MP in 1983. In the party he was considered to be serious and even gloomy but with a powerful mind and a passion for detail. A man of enormous intelligence - that's what they say about him. In 2006 he was rated the most successful Chancellor of the Exchequer in modern history. But will he be a successful Prime Minister?