Hungarian Prime Minister Viktor Orban and France's Marine Le Pen headlined a rally in Madrid on Saturday by Europe's biggest far-right bloc, buoyed by electoral gains and Donald Trump's return to power.

Patriots for Europe has realigned extreme-right forces in the European Union. It became the European Parliament's third-largest force after Orban helped launch it last year to pull the bloc towards the far right.

Among the leading extreme-right nationalists taking to the stage were Orban, Le Pen, Dutch anti-Islam firebrand Geert Wilders, Italian Deputy Prime Minister Matteo Salvini and former Czech premier Andrej Babis.