Theresa May & Philip May – 41 Year

Theresa May made a massive transition when she went from Home Secretary under David Cameron from 2010 to 2016 to Prime Minister. Her tenure was from 2016 to 2019, and all the while she also served as a member of parliament for Maidenhead in Berkshire, a position she held since 1997.

Another position she has held for a long time is as the wife of Sir Philip May, who worked for Capital International as an investment relationship manager. They have been married since 1980, having been reportedly introduced by Benazir Bhutto, prime minister of Pakistan at the time. They are unable to have children.