Trump also indicated in his tweet that the names of those speakers would be released within days.
At a speech in Colorado on Friday, Trump said that his children and wife would all be speaking at the four-day convention in Cleveland, Ohio, that kicks off July 18.
“Ivanka, Tiffany, Don, Eric -- they are going to be speaking,” Trump said. “My wife is going to be speaking at the convention. We’re going to have a great time.”
Previously, Trump has also suggested having a “winner’s night” at the convention that would likely include nonpolitical speakers such as famous sports figures.
“That’ll probably be the best-attended night” of the convention, Trump predicted at a rally in Dallas earlier this month.
Conventions have also traditionally been an opportunity for rising political stars to introduce themselves on a national stage, as was the case with then-Illinois state Sen. Barack Obama at the 2004 Democratic National Convention.
Spokespeople for the Trump campaign and the Republican National Convention did not elaborate on Trump’s tweet.