
He's won after running for the second time this year
He lost to Liz Truss in September, but she resigned six weeks later. In the latest leadership contest, Mr Sunak racked up the support of his fellow MPs early, and fast. He crossed the 100 nominations he needed long before the deadline - including from MPs that had previously backed Truss or Boris Johnson.
He "predicted" financial problems under Truss
He clashed with Liz Truss during the previous leadership contest, claiming her plan to borrow money during an inflation crisis was a "fairytale" that would plunge the economy into chaos.
He is the son of immigrants
His parents came to the UK from east Africa and are both of Indian origin. Mr Sunak was born in Southampton in 1980, where his father was a GP and his mother ran a pharmacy. He is now set to be the first British Asian prime minister.
He's only been an MP for seven years
Mr Sunak was first elected as an MP in 2015 - for Richmond in north Yorkshire - but rose quickly, and was made finance minster - or chancellor - in February 2020 under Boris Johnson.