The reality star - who shot to fame on the hit MTV show The Hills - shared the cute family snap on Instagram. Captioning his photo, Spencer wrote: "#tbt family Christmas card #Malibu."
And we have to say, the self-proclaimed bad boy was far more innocent looking back then than he is nowadays!
Pictured giving his best smile, a young Spencer is joined by his Made In Chelsea star sister Stephanie - who is the cutest thing with her chubby cheeks and pigtails - and a third female relative.
Like butter wouldn't melt!
Who knew then that both Spencer and Stephanie would go on to become two of the hottest reality stars in America and here in the UK?!
Famously one half of 'Speidi', Spencer married his Hills co-star Heidi Montag and the couple's tumultuous relationship was played out for all to see on camera.
The couple caused mayhem when they entered the Celebrity Big Brother house last year and Spencer and Heidi split momentarily last month to star in the US version of Celebrity Wife Swap.
Following in her older brother's footsteps, Spencer's little sister Stephanie was too a resident cast member on The Hills and has since gone onto join our SW3 favourites in Made In Chelsea, thanks to dating notorious ladies man Spencer Matthews.
Now BFFs with Lucy Watson and a regular on the Chelsea scene, Stephanie melted our hearts with her on screen fling with Stevie Johnson last series before she had to return to LA.
Let's hope the Pratts will be taking another trip across the pond soon...
We've got our fingers crossed!
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