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John Travolta and Olivia Newton John reunion video
John Travolta and Olivia Newton-John have reprised their roles as Danny and Sandy from Grease.
The pair, now aged 64 and 58 respectively, star in a music video for a song called I Think You Might Like it, which is part of a charity album called This Christmas.
According to the official blurb, Newton-John texted Travolta last Christmas to tell him their 1978 duet had become the best-selling duet in pop music history. The idea for the album came from there. Travolta said in a statement, "From the moment we decided to do this, magic happened. Everyone we contacted agreed to do it."
And they contacted some pretty big names. The album features contributions from Barbra Streisand, Tony Bennett, James Taylor, Kenny G, Cliff Richard and jazz legend Chick Corea.
John and Olivia in Grease (left) and in their new video
Much has been made of the pair's appearance almost 35 years on from the heady days of Grease. Opinion seems to be split down the middle with some people thinking they've aged well and others thinking they look... well... a bit odd.
Click through the gallery below to see how other music stars have aged since 1978...