Ryder’s You’re Christmas To Me secured second place, followed by Carey’s All I Want For Christmas Is You.
Stick Season by Noah Kahan came fourth and Merry Christmas by Ed Sheeran and Sir Elton John came fifth.
Written and produced by the late Michael, Last Christmas was beaten to the crown in 1984 by Band Aid’s Do They Know It’s Christmas?
The 80s pop duo’s hit has now set the record for the longest-ever journey to UK Christmas number one, according to the Official Charts Company.
“Last Christmas has finally ascended to the much-cherished and sought-after Official Christmas Number 1, which was always the main goal,” Ridgeley said.
“George would be beside himself [that] after all of these years, [we’ve] finally obtained Christmas Number 1. Yog [George] said that he wrote Last Christmas with the intention of writing a Christmas Number 1.
“It’s mission accomplished!”
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‘Huge disappointment’ to miss out in 1984
Ridgeley said it was a “huge disappointment” for the pair not to reach the top spot in 1984 as they believed it was “nailed on”.
“Had it not been for Band Aid’s Do They Know It’s Christmas?, it probably would’ve been number one,” the 60-year-old said.
“Thwarted for many years subsequent to that – the perennial bridesmaid – over recent years it seems it’s become part of the fabric of Christmas for a lot of people.
“Christmas number one has been a long-held ambition for Yog (Michael) and I, and for the fans, too. It’ll mean a lot to Wham!’s legacy – it’s the crowning glory.”
‘Fans will have a real sense of achievement’
Ridgeley said the song was “conceived as a Christmas number one” as Michael had “lofty ambitions for himself as a songwriter”, before the band split in 1986.
“Our fans will have a real sense of achievement and pride in the fact it’s become Christmas number one,” Ridgeley added.
Last Christmas is now the UK’s third biggest song of all time, with a combined lifetime total of 5.34 million chart units, the Official Charts Company said.
It was streamed 13.3 million times over the last seven days, making it the most-streamed Christmas number one ever during Christmas week.