Qualification age of the prime ministersof united kingdom?

To become Prime Minister of the United Kingdom, one must be a member of the United Kingdom Parliament and be able to command the confidence of the House of Commons. There is no set age requirement to become Prime Minister, but in practice, the youngest age ever elected to the post is 44 (William Pitt the Younger in 1783) and the oldest age is 77 (Robert Walpole in 1742).