"I think it is wonderful. I am very happy for her and think she will do very well," Trump, 69, says in a statement to PEOPLE.
Before he was a 2016 presidential candidate, the real estate mogul and Maples, 52, were married for six years. They split in 1999 and are parents to 22-year-old daughter Tiffany.
Maples is gearing up to make her ballroom debut with pro partner Tony Dovolani when DWTS premieres on March 21.
"It's time to dance is all I can say," the actress shared during the cast reveal on Good Morning America Tuesday.
On whether the dancing competition will serve as a nice distraction from her ex-husband's presidential campaign, Maples said: "When life gets challenging, you just have to dance right? It's amazing."