Donald Trump's wife Melania is set to make a rare appearance on the campaign trail, just days before election day.

Mrs Trump has largely avoided the spotlight since her infamous speech at the Republican National Convention in July, which had been largely plagarised from a speech given by Michelle Obama in 2008, choosing instead to stay in New York with their son.

She will re-enter the public eye when she speaks in the suburbs of Philadelphia on Thursday.

Trump's campaign manager Kellyanne Conway confirmed the news on Twitter, calling Mrs Trump the "next first lady".

The topic of her speech or whether she will be accompanied by her husband is still unclear, but the move is a clear sign the Trump campaign is stepping up its efforts to win over female voters as Hillary Clinton battles more negative headlines about her email use.

The presidential hopeful appeared to catch his wife off guard during a joint ABC interview last week when he revealed that she would be playing a more prominent role in the campaign during the final week.

Trump said she would be making "big speeches, important speeches", adding: "She's amazing when she speaks. She's amazing. And it's not what she does."