1922 Committee chairman Sir Graham Brady announced the result at 12:30pm following a bitter contest with Mr Sunak getting 60,399 votes well shortm of Ms Truss’ 81,326.
After 12 hustings featuring 20,000 Tory members watched by 2.5 million members of the public the Tories 172,437 members decided to bavkck the Foreign Secretary.
Ms Truss will now try to bring the party together after a contest which has been marred by bitter attacks beginning with 11 potential candidates and being whittled down to a final two for members to decide over the summer.
In her speech to Tories the new PM said: “I will deliver on the energy crisis, dealing with people’s energy bills but also dealing with the long term issues we have on energy supply.”
Mr Sunak and Ms Truss subjected themselves to 12 different hustings of party members while they campaigned around the country.
They also clashed in a number of TV debates which alarmed Tory MPs.
Mr Sunak described Ms Truss’ plans to cut taxes as “immoral.”
Meanwhile, she said that as Chancellor he had “failed to grow the economy.”
In the earlier rounds trade minister, Penny Mordaunt became the focus of attacks from the right of the party over her views on the transgender issue.
There were allegations made and denied that Kemi Badenoch, who briefly became the star turn of the contest, had been put up by Michael Gove to split the party’s right.
There were also claims that Mr Sunak’s team had manipulated votes in a bid to stop Ms Truss from getting to the final two.
Candidates who made a run at replacing Mr Johnson also included Attorney General Suella Braverman, Foreign Affairs Committee chairman Tom Tugendhat, Chancellor Nadhim Zahawi, former Foreign Secretary Jeremy Hunt, and former Health Secretary Sajid Javid.