Lord Harewood was married a second time on 31 July 1967 to Patricia Tuckwell (24 November 1926 – 4 May 2018), an Australian violinist and sister of the musician Barry Tuckwell. The wedding took place at Waveny Park in New Canaan, Connecticut. They were obliged to be married abroad as, in England, registry office marriages were barred at the time for persons covered by the Royal Marriages Act, and divorcees could not marry in the Church of England. They had one son, The Hon. Mark Hubert Lascelles, born 4 July 1964. He married, first, Andrea Kershaw (born 16 June 1964) on 8 August 1992 and divorced in 2005. They have three daughters. He married Judith Ann Kilburn on 16 July 2011.