Diana, Princess of Wales
In an extended version of the clip, a young Prince Harry plays away on the piano.
"It was just a nightmare," the "Back to the Future" star told Jimmy Fallon on "The Tonight Show."
The new star on the Netflix series described one scene in a "freezing-cold swimming pool" in Spain that was the "hardest" to film.
A commemorative statue will be installed next year on what would have been Diana's 60th birthday.
The cast and crew of "Diana" will perform the show in an empty theater and put the finished product on the popular digital platform next year.
The Princess of Wales had many mom moments out with Prince William and Prince Harry.
"Emotionally, things come out of the blue that you don’t ever expect," the Duke of Cambridge said in a new BBC documentary.
"My brother and I remain appreciative of the work you do," the Duke of Cambridge said.
A resurfaced video shows the Princess of Wales running in a race at her son Harry's sports day.
Darren McGrady fired off tweets saying that Prince Harry was "manipulated" and that Meghan "just wanted to be famous."