You WILL NOT believe who this star is in this throwback photo ...

You absolutely will not believe who this little guy grows up to be …

The one and only Ryan Reynolds!

Celebrating his 41^st birthday the Canadian actor took to Instagram to share a throwback photo of when he was just a kid.

"Happy Birthday to me. Or as Dad used to affectionately say, 'the condom broke,'" the star joked alongside a photo of he and his father Jim Reynolds on what appears to be Ryan’s eighth birthday.

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Sadly Ryan's dad passed away in 2015 after a battle with Parkinson’s disease at age 74.

We absolutely love this throwback snap. It definitely made us do a double take.

Last week Ryan shared another super adorable snap from his childhood.

"The first car my brother and I jacked together. I’ll never forget that bowl-cut. Or the sound of Dad screaming from the trunk," he captioned the photo.

How cute!