Emmanuel Macron's pledge to transform the French political landscape moved closer to fulfilment today when a former Socialist prime minister said that he was joining his camp.
Valls, a centre-leaning politician in favour of relaxing France's tight labour protections, could not even win his own Socialist party's presidential primary, losing to Benoit Hamon.
Centrist Emmanuel Macron won 66.1 percent of the vote whereas his rival, the far-right National Front leader, Marine Le Pen, got 33.9 percent, according to the official results announced by the head of the Council, Laurent Fabius at a news conference.
Valls said that "I will be a candidate in the presidential majority and I wish to join up to his movement, the Republic on the Move".
However, it is not clear if he will be able to do so.
U.S. President Donald Trump and French President-elect Emmanuel Macron will meet on the sidelines of the North Atlantic Treaty Organisation leaders meet in Brussels on 25 May, 2017.
"Every support to the president is welcome", said Jean-Paul Delevoye, the president of the commission in charge of assessing candidates.
"But support doesn't necessarily translate into a nomination".
"President Trump emphasized his desire to work closely with president -elect Macron in confronting shared challenges, and noted the long and robust history of cooperation between the United States and its oldest ally, France", the White House said. "[Vall's] voice is not insignificant, but his candidacy will be treated like anyone else's".
"The Prime Minister warmly congratulates President-elect Macron on his election success".
Manuel Valls, 54, stunned his Socialist colleagues by saying that he wanted to stand in June's parliamentary elections as a candidate on Mr Macron's side.
The poor result triggered a fierce debate within the party on the opportunity of sticking to the left platform defended by Mr Hamon, or to switch back to the more centrist views of Mr Valls and his allies.
"I applaud the determination of M. Macron in his acceptance speech, to "fight the divisions that undermine France", and effect the change the French people voted for", Akufo-Addo said.
Indian Prime Minister Narendra Modi also hailed Macron's victory.
Hamon said his movement would be launched on July 1, after legislative elections in June that are crucial to Macron's chances of enacting his programme.