Can you guess who these celebs are from their throwback photos?

How cute do the Falcone family look in their school uniforms?

Giovanna Fletcher's younger brother and The Only Way Is Essex star Mario posted this snap to mark Gi's 36th birthday.

It's clear to see Gi on his right, with older sister Giorgina on his left.

This gorgeous little thing is This Morning presenter Holly Willoughby with her dad, who bears an uncanny resemblance to Simon Cowell, don't you think? Especially with those shades on!

Does this little boy look familiar to you at all? It's the one and only former England footballer, David Beckham.

Do you think he looks like any of his sons in this photo?

Proving he always had swag, Bruno Mars shared this gorgeous photo of himself as a baby. What a little cutie!

The embroidered letters on this little girls' dress give away who it is. Yes, it's American actress Reese Witherspoon. Doesn't she look adorable?!

This brown-eyed beauty is none other than TV presenter Rochelle Humes.

Her daughters Alaia-Mai and Valentina are the ultimate combination of her and hubby Marvin.

HOW much does John Legend's kids – Miles and Luna – look like him when he was a baby?!

It's seriously uncanny.

We can recognise Stacey's voice a mile off, but her throwback photo was a little harder to figure out.

She looks like such an angel sitting here.

Daisy May and Charlie Cooper, the writers and stars of the BBC hit comedy This Country, look much more innocent than their on-screen characters in this throwback snap.

So sweet!

Now surely you recognise this boy?! It's everyone's favourite Friends star, Matt LeBlanc.

He's hardly changed at all ... apart from the hair!

It took us a minute to figure out this smiley little girl is singing sensation Adele.

If only she knew then she'd grow up to win an Oscar, 15 Grammy Awards and nine Brit Awards ...

We'd recognise that face anywhere. It's a throwback of Benedict Cumberbatch from his school days, as part of the rugby team.

This little lady kept her hair in bunches throughout the 1990s as a Spice Girl ...

Emma Bunton as a baby spice before she actually became Baby Spice!

Aww! Thor actor Chris shared this throwback snap with his little brother Liam to mark his 31st birthday.

In the caption, he wrote: 'Happy birthday @liamhemsworth this photo was taken 3 years ago today, damn time flies but you haven’t changed a bit'.

Classic bit of brother banter.

If the bright blonde hair didn't give it away, the little girl smiling on the left is pop singer Taylor Swift.

He's still got that cheeky smile and bright eyes ... it's Robbie Williams from back in the day.

Who'd have thought Dwayne 'The Rock' Johnson would ever have looked like this?!

Sharing this MAJOR throwback on Instagram, the actor wrote:

'Throwback to 7 years old in Hawaii, and just drippin’ cool with my buck teeth, aloha shirt and WTF is going on with my afro matted down on one side!?🤦🏽‍♂️

'No way this stud doesn’t grow up to become Sexiest Man Alive 🤣
#HellooooLadies
#BuckyJohnson
#SmellsLikeHotDogs
#KingOf2ndGrade'

Yep, we can't quite believe it either!

The Hidden Figures actress shared a collection of photos from her younger days and it's clear to see she's aged VERY well.

Those bunches are so cute!

We think the eyes TOTALLY give this little one away.

It's a childhood photo of Katy Perry – we really can't get enough of that haircut!

Cheryl shared this old photo of herself as a dancing diva on her social media. Just look at those dimples!

Oh wow – this has the '90s written all over it.

Hilary shared this brilliant throwback on her social media, and captioned it '#thanksmom'.

Mums have the right to dress their kids up in embarrassing outfits, surely?

Recognise this teen? It's rapper Nicki Minaj, of course.

Thanks to her colourful wigs and outrageous outfits, she looks pretty different nowadays.

The supermodel sisters have always been gorgeous, clearly, although they look so grown up and different now.

This is SUCH a cute sister snap.

Look at this all-American star before mega-fame – and how much does little sister Jamie-Lynn look like Britney?

Is that a pout already? Kylie Jenner shared this adorable childhood picture on her social media. My, how she's changed!

Her daughter Stormi looks just like she did.

She doesn't look like such a 'bad gal' here ... Rihanna looks totally sweet and innocent in this childhood snap.

Can you tell who this little bunny is?

We would never have thought it's Guardians of the Galaxy actor Chris Pratt at first glance.

Fashionistas even as small children – Beyonce and her little sister Solange.

Can't beat those retro clothes!

Even though this was before she became a selfie queen, Kim was always ready for the camera, so it seems.

Just look at little baby Ariana and her big brown eyes.

We're guessing it's not the same yellow jumper in both pics, though – might be a tad small now ...

Always the ladies' man, here's a young Justin Bieber with his first love ... his mum!

Forever the socialite, here's a baby Paris Hilton being held by Nancy Reagan, the wife of the 40th president of the United States, Ronald Reagan.

Yep, our childhood photos totally feature superstars like this, too ...

She doesn't look very gaga here! A young Lady Gaga eating cereal with her baby sister ... aww, cute.