A mum and son have taken the internet by storm by starring in a heart-warming Carpool Karaoke-style video.

The clip features four-year-old Ben Constable and mum Claire, whose husband Darren grew up in Queenborough on the Isle of Sheppey and went to Borden Grammar School in Sittingbourne.

The pair are among 50 parents and children with Down’s Syndrome seen lip-syncing, and using Makaton sign language, to Christina Perri’s 2011 hit A Thousand Years in the style of James Corden’s popular car-based sing-along.

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The video, made ahead of World Down Syndrome Day today, March 21 has already been viewed 2.5 million times on Facebook, and has been shared by the likes of Russell Brand, Piers Morgan, Phillip Schofield as well as Corden himself, who admitted it made him cry.

The four-and-a-half minute clip, which uses the hashtag #wouldntchangeathing was created by parents in a Facebook group, which brings together guardians of children with the condition, and was based on videos by Makaton signing duo Singing Hands.

Mrs Constable, 33, who now lives in Lichfield, Staffordshire, and is also mum to one-year-old Ella, found out during pregnancy that Ben would be born with Down’s Syndrome and was given the option of terminating the birth.

However, the couple were in the minority of parents who decided to carry on regardless.

“We wouldn’t have him any other way, and that’s a big message we want to spread through the video,” she said.

“We wanted to do our own version to promote awareness around the condition and just celebrate our children and do something nice.

“People are aware of Down’s Syndrome, but not always in a positive way, so we wanted to try and change people’s viewsand put across that we’re just normal mums with four-year-old children who are more alike than different to other kids.

“We feel sometimes people put the condition first rather than the person, so they say ‘Down’s Syndrome children’ rather than ‘a child with Down’s Syndrome’. It doesn’t define them. They’re individuals and it’s important for people to recognise that.”

Mr Constable, 31, added: “I’m extremely proud of everything all the girls have done and the work Claire has done specifically in tweeting the celebrities and getting them to endorse it.”