"We love you!" members of the crowd screamed as she took the stage in Berwyn, Pennsylvania.
"Thank you," Melania Trump said. "We love you too," she added a minute later.
She thanked her husband's supporters and touched only briefly on his candidacy before moving on to discuss her own childhood before she immigrated to the United States and her work as a model.
In August, Donald Trump's campaign announced that Melania Trump would hold a press conference to answer looming questions about her immigration status before she married the real estate mogul and became a citizen. While the press conference has not taken place, she touched on the subject in her speech Thursday.
"As a young entrepreneur, I wanted to follow my dreams to a place where freedom and opportunity were in abundance. So of course, I came here," she said.
Trump said that she embarked on "a 10 year process which included many visas and a green card" before becoming a U.S. citizen in 2006.
"Love for this country is something we immediately shared when I met Donald," she said, praising her husband for his ability to "get things done, not just talk" and "shake things up."
She went on to discuss her plans to fight online bullying as first lady.
"I will be an advocate for women and for children," she said. "Children and teenagers can be fragile. They are hurt when they are made fun of or made to feel less in looks or intelligence."
Trump went on to condemn "mean and too rough" comments made by people with "no name hiding on the Internet."
"We have to find a better way to talk to each other, to disagree with each other, to respect each other," she said.
"We must come together together as Americans," she added. "We must treat each other with respect and kindness even when we disagree."
Yet her husband Donald Trump has insulted more than 200 people, places and things on Twitter since announcing his candidacy in June 2015, according to a New York Times report.
He has attacked the physical appearance of a former writer for People magazine who alleged that he forcibly kissed her in 2005, telling the crowd at an October to "look at her," implying that she was not attractive enough for him to force himself on her.
One day later, he appeared to insult Democratic opponent Hillary Clinton's appearance at another rally, saying he "wasn't impressed" when Clinton walked in front of him during the second presidential debate.