Republican front runner Donald Trump was officially declared party’s presidential nominee after a roll call vote overshadowed by dissent and apathy.
He sailed to the 1,237-delegate threshold, with his home state of New York putting him over the top.
Results were declared on the second day of the Republican National Convention (RNC) in Cleveland after Trump's son, Donald Trump Jr., announced the 89 delegates that formally clinched the nomination.
"It is my honour to be able to throw Donald Trump over the top in the delegate count tonight with 89 delegates," Donald Jr. said, surrounded by three of Trump's other children -- Ivanka, Eric and Tiffany.
"Congratulations Dad, we love you."
Donald Trump himself tweeted that it was a "great honour" and vowed not to let the country down, Politico added.
"Such a great honour to be the Republican Nominee for President of the US," he said. "I will work hard and never let you down."
The business magnate's official nomination is a new apex in the political outsider's campaign to shake up Washington.
His presidency bid began last June with a widely panned, rambling speech in which he blasted Mexicans as "rapists" and vowed to build a wall on the southern border that Mexico will pay for, Politico noted.
Trump's campaign has ostensibly endured strife almost daily since its inception.
Republican leaders were slow to back his campaign and have continued to condemn his controversial rhetoric and actions.