French far-right presidential hopeful Marine Le Pen said she would appoint eurosceptic Nicolas Dupont-Aignan as her prime minister if she was to be elected on 7 May.
Mr Dupont-Aignan, who scored 4.7% of votes in the first round on 23 April, announced yesterday that he was backing Ms Le Pen, as widely expected.
"As President of the Republic I will name Nicolas Dupont-Aignan prime minister, supported by a presidential majority and united by the national interest," she told a news conference in Paris at which the two politicians sat together.
Mr Dupont-Aignan stood in the election for his party 'Stand up France' said he had signed an agreement on the future government with Ms Le Pen that took into account some "modifications" of her programme.
Polls yesterday showed centrist Emmanuel Macron winning the French presidential runoff with 59-60% of votes, although Ms Le Pen has gained some ground since the start of the week.
Mr Dupont-Aignan has expressed differences with the Ms Le Pen on social issues in the past, and has opposed her call for the reintroduction of the death penalty.
In the past he has called his party "Gaullist" after followers of the late president of the centre-right Charles deGaulle.
In 2013, he tweeted "We are Gaullists and cannot align ourselves with the extreme right."
Mr Macron, on a campaigning trip in central France, said the alliance clarified the choice on offer to voters between those who are anti-European and those who have more "progressive"views.
Earlier, Macron's party En Marche! (Onwards!) called on Ms Le Pen to condemn comments her father made about a ceremony for a policeman who was killed in an attack in Paris last week.
Jean-Marie Le Pen, 88, and the founder of the National Front, objected to a speech made to the ceremony by Xavier Jugele's partner.
"The long speech he made in some way institutionalised homosexual marriage, exalted it in a public way, and that shocked me," Mr Le Pen said in an interview on his website that was aired yesterday.
"Marine Le Pen has still not firmly condemned these comments," a statement released by En Marche! said today.
Ms Le Pen was asked yesterday whether the speech by the policeman's partner shocked her the way it did her father. She replied that, on the contrary, she had found the ceremony and the speech moving.
Controversial comments from her father on a range of subjects from criticism of gay marriage to his suggestion that the Holocaust was a "detail" of history have dogged her efforts to rid the party of its extremist image.
Associations made between the National Front and Holocaust denial returned to the political stage yesterday after one of its senior officials was forced to step aside to defend himself from allegations, resurfacing after more than a decade, that he had agreed with comments from a professor who has been convicted of incitement to racial hatred.
