Ashton Kutcher, Rosie Fortescue, Caroline Flack...did you know all these celebs were twins?

Presenting the X Factor isn’t the only thing Caroline Flack and Olly Murs have in common – the pair are also both twins! Maybe that’s why they’re such close mates?

Caroline recently posted a throwback picture on her Instagram of her and her twin sister Jody, writing: ‘Nothing beats having a twin…love you @jodyflack’.

But she’s not the only celebrity twin we never knew about. Her X Factor co-host Olly Murs also has a twin – his brother Ben, but unfortunately the two lost touch when Olly was unable to attend Ben’s wedding in 2009, due to having X Factor rehearsals.

Made In Chelsea’s Rosie Fortescue also has an identical sibling, Lily, while Olympic runner Mo Farah has a twin, Hassan, who still lives in their native Somalia.

Also flying the flag for celeb siblings are non-identical twins Scarlett Johansson and her brother Hunter, who often attend events together, just like Ashton Kutcher and his twin Michael.

Look through our gallery to see more unexpected celebrity twins!