Lembit Öpik is a British former politician who represented Montgomeryshire in Wales as a Liberal Democrat Member of Parliament from 1997 to 2010. During his parliamentary career, he served as leader of the Welsh Liberal Democrats from 2001 to 2007. He made unsuccessful bids for the party presidency in 2004 and 2008, and also sought to become the Liberal Democrats' candidate for the 2012 London mayoral election without success.

Beyond his political career, Öpik gained public recognition through television appearances and considerable media attention surrounding his personal life, particularly his relationships with ITV weather presenter Siân Lloyd and Gabriela Irimia of pop duo the Cheeky Girls. Since losing his parliamentary seat at the 2010 general election, he has remained a public figure. Öpik now writes political and policy commentary for Comment Central.