British Prime Minister Boris Johnson and partner Carrie Symonds announce engagement and baby on the way.
According to CNN, the last child born to a sitting prime minister was in 2010 to David Cameron and his wife.
Symonds is also involved in politics, working as part of the campaign team that got Johnson re-elected as mayor in 2012.
She then became the younger director of communications of the Conservative Party.
Johnson has four children from his second marriage