Mr Javid has been confirmed as Chancellor, replacing Philip Hammond who resigned after Mr Johnson won the Tory leadership contest. Ms Patel will replace Mr Javid as Home Secretary, in a shock return to the frontbench. Meanwhile former Brexit Secretary, Dominic Raab, has been appointed Foreign Secretary – replacing Jeremy Hunt.
Mr Raab return to the Cabinet will also see him become First Sectary of State, effectively making him Mr Johnson’s Deputy PM.
Meanwhile Ben Wallace has been appointed as Defence Secretary – after the role was initially turned down by Mr Hunt.
Lizz Truss, a leading candidate to become the first-ever female Chancellor has replaced Dr Fox as International Trade Secretary.
Matt Hancock who stood in the Tory leadership contest will remain as Health Secretary.
The new Cabinet also sees Michael Gove, Mr Johnson’s Vote Leave colleague who scuppered his last leadership bid, moved from environment secretary to Chancellor of the Duchy of Lancaster.
Theresa Villiers has replaced Mr Gove.
The appointments came after Mr Johnson wielded the axe, with more than half of Mrs May’s Cabinet either quitting or being sacked.
Jeremy Hunt, Mr Johnson’s rival in the Tory leadership race, left the Government after refusing to be demoted from foreign secretary.
Penny Mordaunt and Liam Fox, prominent backers of Mr Hunt, were among the first to be sacked as Mr Johnson carried out a radical reshaping of the Cabinet.
Other ministers shown the exit include Damian Hinds, Greg Clark, David Mundell, Karen Bradley, James Brokenshire, Jeremy Wright and Mel Stride.
Before Mr Johnson even took office, Philip Hammond quit as chancellor, David Gauke resigned as justice secretary and Rory Stewart left his post as international development secretary.
David Lidington, Mrs May’s de facto deputy prime minister, left office at the same time as his boss while Chris Grayling resigned as transport secretary.
Stephen Barclay is one of the few members of Theresa May’s team not to be fired and will stay on as Brexit Secretary.
Mr Javid upon leaving Number 10 said he was “deeply honoured” to be moving into Number 11.
He wrote on Twitter: “Deeply honoured to be appointed Chancellor by PM @BorisJohnson.
“Looking forward to working with @hmtreasury to prepare for leaving the EU, unifying our country and priming our economy for the incredible opportunities that lie ahead.”
The newly appointed Home Secretary, Ms Patel, said she will “do everything in my power” to keep people safe.
Mr Raab has said he is “hugely humbled” to be taking on his new role.
He said: “Obviously we have got the challenges of Brexit. That is something we want as a country to rise to.
He added: “Obviously, the Foreign Office, the message about the opportunities around the world and our confidence in our country and taking those opportunities with enthusiasm and optimism is something I can’t wait to get involved with.”