David Cameron and Nick Clegg shook hands on the steps of Number 10 Downing Street on Wednesday before getting down to the business of running the country.
The pair went to work hours after finally putting together their historic Tory/Lib Dem coalition government.
Prime Minister Cameron promised that the union would be a "full and proper" coalition between the two parties.
Mr Clegg has been appointed Deputy Prime Minister, serving as one of five Lib Dem ministers in the new administration.
The key jobs of Chancellor and Foreign Secretary go to Tories George Osborne and William Hague.
But the appointment of so many Lib Dem ministers means that a number of Tory shadow ministers will be out of luck and one of Mr Cameron's first tasks will be to placate those who are among the disappointed.