Holly Willoughby shares adorable back-to-school throwback photo with rarely seen older sister

As children across the world return to school this week, emotions have been running high among celebrity parents, including mum-of-three Holly Willoughby.

Holly Willoughby is undoubtedly in the back-to school spirit as she recently shared new photos uploaded to her Instagram, including one cute photo with her older sister Kelly.

Just hours after a sweet post about her four-year-old son Chester’s first day at primary school, the This Morning presenter took to Instagram to share her own never-before-seen school photo featuring her big sister Kelly.

In the throwback image, a young Holly showcases her famous smile while posing in school uniform as Kelly wraps her arm around her little sister.

MORE:Holly Willoughby shares rare photo with husband Dan for sweet reason

Encouraging her 5.7m followers to share their own back-to-school photos and tips as part of an anti-bullying campaign with The Diana Award and Anti Bullying Pro, Holly captioned the image: ‘Me and my sis @ladywilloughby off to school many moons ago…and now it’s a new school year… perhaps there’s a new school to discover and new friends to make.

‘Whatever challenges you are faced with this September…attack them with all the self-belief, hard graft and determination you can muster…you’ve got this guys!’

Holly’s fans were quick to comment on how little the star has changed since her childhood, with one writing, ‘You haven’t changed a bit @hollywilloughby x.’

‘Still have the same smile,’ wrote another, while a third added, ‘Holly you were as beautiful then as you are now!’

MORE: Holly Willoughby fans distracted by THIS amazing house cleaning tip in latest Instagram post (opens in new tab)

Many followers even mistook the young Holly for her seven-year-old daughter Belle Baldwin, with one fan writing: ‘Your daughter in your mini! Beautiful x.’

Despite Holly's hair being a slightly darker shade of blonde when she was younger, the now 38-year-old has barely changed in the decades since the photo was taken. We’d recognise that smile anywhere!