Patrick McLoughlin is no longer transport secretary, instead he has been appointed Tory Party chairman and Chancellor of the Duchy of Lancaster.
That gives him responsibility for the Cabinet Office, the role formerly held by Oliver Letwin.
She has defined her new cabinet as "bold" - but what else do we know about them? Here, we look at the key stats.
As Britain reshapes its role in the world, here are some of the key issues Boris Johnson will have to consider.
George Osborne, Michael Gove and Nicky Morgan have been sacked - but there were a number of surprise appointments.