LONDON (Reuters) - Britain’s Prince Harry is engaged to his U.S. actress girlfriend Meghan Markle with the marriage due to take place in the spring of 2018, his father Prince Charles announced in a statement on Monday. Harry, 33, currently fifth-in-line to the British throne, and Markle, 36, best known for her role in the U.S. TV legal drama “Suits”, became engaged earlier this month, the statement issued by Clarence House said.