The Hungarian prime minister has unveiled a new government following his Fidesz party's landslide victory last month.

Viktor Orban secured a fourth consecutive term in office in Hungary in the general election on April 3, with his brand of right-wing populism defeating a coalition of opposition parties.

Orban was officially signed back into the role in a ceremony in the country's parliament, on the banks of the River Danube in Budapest.

"I will be loyal to Hungary. I will keep its laws, I will exercise my office of Prime Minister for the benefit of the Hungarian nation," he pledged.

Orban has been prime minister since 2010, and is the longest-serving incumbent head of government in the European Union.

Contested election

The Organization for Security and Co-operation in Europe (OSCE) sent monitors to supervise the election, and found that government advertising paid for by the state gave the Fidesz party an undue advantage.

The OSCE said that although the election process was competitive, the process was marred by what it described as media bias and opaque campaign funding.

Peter Szijjarto, who has been the Hungarian foreign minister since 2014, is continuing in his post – and there is currently a lot of focus on Hungary's foreign policy. Orban-led Hungary has been one of the most friendly EU and NATO governments towards Moscow.

The administration insists it will not support any EU sanctions that target Russian energy exports. Hungary is heavily reliant on Russian oil and gas and says the EU oil boycott would be an "atomic bomb" for its economy, destroying its "stable energy supply."

Brussels is considering exemptions from sanctions agreements for eastern European nations particularly reliant on energy imports from Russia.

As well as a new government, Hungary also has a new president, though the role is largely ceremonial: 44-year-old Katalin Novak is not only the youngest head of state in Hungary's history – she is also the country's first female president.

Novak was sworn in on May 14 promising to be a president for "all Hungarians."