They may look perfectly put together on our TV screens and on the red carpet, but celebrities aren't immune to embarrassing childhood photos! Before becoming famous, stars such as the Duchess of Cambridge, Kris Jenner and Andrea McLean were just like the rest of us.
Want to see the proof? HELLO! has gathered all your favourite stars' school photos, including impressive hair transformations, family resemblances and even prom snaps. Take a trip down memory lane to see throwbacks of celebrities at school…
Rochelle Humes
Although it's clear Alaia-Mai and Valentina take after their mum Rochelle Humes, we didn't realise how much until we saw photos of the This Morning star as a child! Shortly before she welcomed her first daughter, the former Saturdays singer reminisced of her own childhood. And she's so cute!
SEE: 9 adorable photos of royal children with their new baby siblings
The Duchess of Cambridge
Kate Middleton, aged 19, spent ten weeks on a Raleigh International expedition trip to Patagonia in Chile, during her gap year in 2001. Kate did wilderness trekking and analysed marine life during her time abroad, before going on to meet Prince William at St Andrew's University.
Ruth Langsford
Can you guess which one Ruth Langsford is? The This Morning star looked almost unrecognisable when she shared a throwback photo during a Loose Women appearance, describing herself as "gawky-looking."
Referring to Ruth's short dark bob, Janet Street-Porter quipped: "The one with the dodgy hair grip?" Ruth replied: "Yes, the dodgy hair grip. That's about as fashionable as we got – the kirby hair grip. The hair was down like that. No makeup, we weren't allowed makeup. I was covered in freckles. But I look at the girls now coming out of school and they're so glamorous."
Oprah Winfrey
Oprah Winfrey was a pupil at East Nashville High School, and was destined for great things, being voted Most Popular Girl during her time there. The famous chat show host also belonged to many groups, including the National Forensic League and the Honor Society.
READ: The 10 most endangered baby names for boys and girls – and one is royal!
Andrea McLean
Loose Women star Andrea McLean looks almost unrecognisable during her school years, sporting a volume-heavy perm and a fringe.
Brad Pitt
Brad Pitt attended Kickapoo High School in Springfield from the age of 11, before moving LA as a teenager to pursue his acting career. In photos from his year book, the Once Upon a Time in Hollywood star looks identical to his daughter Shiloh, 14, who he shares with ex-wife Angelina Jolie.
Holly Willoughby
This Morning star Holly Willoughby shared a sweet photo of herself with her big sister Kelly during their time at primary school. The TV presenter had a lovely time at school, and often talks about her happy childhood.
George Clooney
George Clooney looks almost unrecognisable in photos from his year book during his time at Augusta High School, although his trademark dark eyes and heavy brows give the game away.
Prince William
Prince William is pictured after passing his driving test first time in Cirencester, Gloucestershire in June 1999. The then 17-year-old royal punched the air with delight after his instructor gave him the good news, according to reports at the time.
Goldie Hawn
Goldie Hawn is renowned for her long, blonde hair, but during her time at Blair High School, Maryland, the award-winning actress rocked a short pixie cut.
RELATED: Inside royal baby hospitals: where Kate Middleton, Meghan Markle and more gave birth
The Queen
The Queen, then Princess Elizabeth, is pictured enjoying a bike ride around Royal Lodge in Windsor, aged 16 in 1942. The future monarch and her sister, Princess Margaret, stayed in Windsor for their safety during the Second World War.
Kris Jenner
Keeping Up with the Kardashians star Kris Jenner is renowned for iconic short hairstyle, but in 1973, the famous momager rocked long, shoulder-length hair during her time at Clairemont High School in San Diego, California.
Michael Douglas
Michael Douglas was a pupil at Choate Rosemary Hall High School in Wallingford, Connecticut, between the years 1960 and 1963. The Hollywood star's year book photo shows him wearing a smart suit, and resembling his teenage daughter Carys, 17.
PHOTOS: Inside Kate Middleton's family album: see photos of George, Charlotte and Louis
Zara Tindall
Long before meeting Mike Tindall, a 14-year-old Zara Tindall is pictured here at the Gatcombe Park Horse Trials in 1995 - something she now competes in herself.