President-elect Donald Trump spoke with both Hillary and Bill Clinton in the hours after his stunning election victory, he told CBS' 60 Minutes.

Hillary Clinton's concession in the early hours of Wednesday "was a lovely call, and it was a tough call for her," Trump told 60 Minutes in an interview clip broadcast Friday on the CBS Evening News. "I mean, I can imagine. Tougher for her than it would have been for me. I mean, for me, it would have been very, very difficult."

The full 60 Minutes interview will be aired Sunday night.

Trump added that Clinton "couldn't have been nicer. She just said, 'Congratulations, Donald, well done.' And I said, 'I want to thank you very much, you were a great competitor.' She is very strong and very smart."

Bill Clinton, the former president, called the next day and was equally gracious, Trump said.

"He said it was an amazing run, one of the most amazing he's ever seen," Trump said. "He was very, very, really, very nice."

Trump said he might call the former president for advice in the future.

"Well, he's a very talented guy," Trump said. "I mean, this is a very talented family."