Rob Jetten became the youngest prime minister in Dutch history on Monday when his minority government was formally confirmed in power by King Willem-Alexander.

Jetten, 38, propelled his progressive, pro-European Union D66 party to a surprising election victory last October in a polished and optimistic campaign, promising a ?break from the divisive previous government dominated by nationalist Geert Wilders.

His optimism will be put to the ?test from ?the start, as his center-right coalition lacks a majority in the Netherlands¡¯ lower and upper ?houses of parliament and will need opposition support for all its proposals.