Sir Nicholas William Peter Clegg is a British media executive and former politician who served as Deputy Prime Minister of the United Kingdom from 2010 to 2015 and as Leader of the Liberal Democrats from 2007 to 2015. He was Member of Parliament (MP) for Sheffield Hallam from 2005 to 2017. An "Orange Book" liberal, he has been associated with both socially liberal and economically liberal policies. In 2018, Clegg became vice‑president of global affairs and communications at Facebook, Inc., before being promoted in 2022 to president for global affairs.

The deputy prime minister of the United Kingdom is the second highest ranking minister of the Crown and a member of the British Cabinet. The title is not always in use and prime ministers have been known to appoint informal deputies without the title of deputy prime minister. The incumbent deputy prime minister is Oliver Dowden who also serves as Chancellor of the Duchy of Lancaster and Secretary of State in the Cabinet Office.