Boris Johnson becomes fourth prime minister to have baby while in office in 170 years

Sign up to our free Living Well email for advice on living a happier, healthier and longer life Live your life healthier and happier with our free weekly Living Well newsletter Live your life healthier and happier with our free weekly Living Well newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. The 55-year-old has become only the fourth prime minister in more than 170 years to have a child while in his senior position, following David Cameron, Tony Blair and Lord John Russell. Feel incredibly blessed.” Preceding Mr Johnson, here are the other former prime ministers of the UK who had children while sitting in office: David Cameron open image in gallery David and Samantha Cameron with baby daughter Florence Rose Endellion outside 10 Downing Street on 3 September 2010 In August 2010, then-prime minister David Cameron and his wife, Samantha Cameron, celebrated the arrival of their daughter, Florence Rose Endellion Cameron. Tony Blair open image in gallery Tony and Cherie Blair with son Leo at 10 Downing Street on 21 May 2000 When Leo Blair was born to Tony and Cherie Blair in 2000, he became the first legitimate child of a serving prime minister to be born in more than 150 years. Lord John Russell open image in gallery John Russell, 1st Earl Russell, pictured on 1 August 1861, between his two terms in office as prime minister John Russell, 1st Earl Russell known as Lord John Russell, served as prime minister of Great Britain twice, first from 1846 until 1852 and the second time from 1865 to 1866.