This will be the Conservative Party leader's third child with Carrie. The couple has two children Wilf and Romy Johnson who were both born when Boris was the prime minister in 2020 and 2021 respectively.
Amid reports Rishi Sunak, 42, may shun 10 Downing Street as his family home to minimise disruption for his children, FEMAIL takes a look at what life may look like for the hands-on father as prime minister.
Two-year-old Wilfred met some of his favourite TV stars - characters Chase, Skye, Rubble and Marshall from hit cartoon series Paw Patrols - at the Port Lympne Reserve in Kent.
Nadine Dorries was spotted smiling as she left the grace-and-favour country home in Buckinghamshire on Sunday following reports the PM hosted his leaving do with friends and family .