Damian Green has been appointed First Secretary of State as Theresa May reshuffles her top team.
Mr Green, who was previously Work and Pensions Secretary, takes the title generally associated with the role of deputy prime minister.
A long-standing ally of Mrs May, he will also take on the role of Minister for the Cabinet Office.
Theresa May is expected to receive a frosty reception when she meets the 1922 Committee later. But what do we know about the group?
The Prime Minister appointed her former leadership rival as Environment Secretary as she confirms her new top team.
He insisted he would be backing Theresa May as leader and has warned MPs to "calm down and get behind the Prime Minister".