Debbie Killingback was just 19 when she flew to Saas-Fee, Switzerland, to play George Michael’s girlfriend in the popular Christmas music clip.
It is understood George died at his home in Goring-on-Thames, Oxon on Christmas Day from heart failure.
Debbie joins Elton John, Mark Roson, Ellen DeGeneres and other stars who have shared tributes to the British icon.
Debbie – who worked 16 hour days shooting the Wham! clip – described the singer as “lovely” and “down to earth” as the placed flowers and a photo of her and George in the music video.
“He was just lovely, normal and down to earth”
She added it “felt natural” to be his girlfriend in the film.
Debbie, now 51, said: “I was actually a Go West fan at the time which he wasn’t too happy about, but after Last Christmas, I became a Wham! fan.
“I sent in my tapes and I was the smallest actress who auditioned, but he saw the tapes and gave me the part.
George Michael dies on 25th December, 2016, age 53
“I played George’s current girlfriend, but of course he really loved his ex, who was played by another lady.”
Debbie recalled memories of an avalanche warning which delayed the shot, a bed scene with her and George that got cut and close friendships formed on the shoot.
She added: “I’m the one you see at the beginning.
“It was four days of filming but it was very intense, we worked 16 hour days.
George Michael Performs At Palais Garnier in 2012
“At one point, when they were filming us jumping over the fence, there was an avalanche warning and we all had to leave the set.
“I also didn’t have the right ski boots at one point, so George lent me his.
“When we went back I missed my plane and George was at the airport and said ‘We thought you’d been kidnapped.’
“George and I also had a bed scene but that got cut.”
Recalling her memories of the late star, Debbie said: “He was just lovely, normal and down to earth.
“He was fun and liked to laugh and was just the most amazing person.
“We all became close after the video was filmed.”
She added: “I wasn’t surprised it became such a big hit.”
Earlier, Buffy the Vampire Slayer star Sarah Michelle Gellar made a blunder as she tweeted a touching tribute to the wrong “George” after she said she had misheard who had died.