Her roughly 15-minute speech was a bid to soften the image of the NY businessman-turned-politician, who has been accused of bigotry and callousness for his calls to suspend Muslim immigration and deport millions of undocumented immigrants if elected.
The presumptive Republican nominee made a dramatic entrance, silhouetted against a white background, to the accompaniment of Queen's 1977 rock anthem, "We Are the Champions". It is a tradition of the party conventions for spouses to offer an enthusiastic personal endorsement of candidates.
A day after an angry convention-floor eruption laid bare how many Republicans are still reluctant to nominate Trump, his team lined up a roster of supporters eager to showcase their belief that the flashy business mogul should be president.
Rep. Chris Collins will give the first of two speeches that second the nomination of Donald Trump for the Republican candidacy for President.
"Donald wants prosperity for all Americans", she said, reading from a teleprompter, as people applauded.
They taught and showed me values and morals in their daily lives.
"I think everybody fell in love with her tonight", said Deedee Kelly, a delegate from Omaha, Nebraska.
Trump's campaign and allies described the controversy as a meaningless distraction, but offered no explanation for why two passages in the speeches - each 30 words or longer - matched almost word-for-word.
From a young age, my parents impressed on me the values that you work hard for what you want in life; that your word is your bond and you do what you say and keep your promise; that you treat people with respect. "Because we want our children in this nation to know that the only limit to your achievements is the strength of your dreams and your willingness to work for them".
Donald and Melania Trump.
The campaign said the speech was written by a "team of writers" who included fragments that reflected Mrs. Trump's thinking. She traced her own life story, coming to America from Slovenia, and painted a softer, more rounded portrait of her husband than the hard-nosed, insult-throwing candidate voters have seen at every turn. Trump's family is playing a starring role, beginning Monday with an evening speech by his wife, Melania Trump, who has kept a low profile throughout the campaign. Asked if she had been rehearsing her remarks, she said: "I read once over it and that's all because I wrote it, and with as little help as possible". "We were ignored. We were silenced by the RNC and Trump campaign". "There aren't that many similarities".
"There is a political tint to this whole issue", Manafort told reporters. Collins' speech will be a three-minute speech taking place at 6:05 p.m.
Earlier, anti-Trump delegates failed in their final push to block Mr Trump's nomination.
Mrs. Trump was praised for her success in doing just that, despite the plagiarism charges. "And she never cribbed from another speech without acknowledging that she was quoting somebody else". "There was nothing that she did in that speech that she thought was anybody's words but herself", Manafort said.
She has top billing for the first prime-time session and will make the case for her husband's policies and personality. "Frankly this was her vision that she wanted to communicate about her husband". Though well-received, the speech contained two passages that match almost word-for-word the speech that first lady Michelle Obama delivered in 2008 at the Democratic National Convention.