The Imitation Game.

The Hollywood heartthrob has had a number of high profile relationships but this is something we never noticed.

According to this eagle-eyed Tweeter, Brad assimilates the style and hair of his other half after he's been with them a while.

Obviously a LOT of people never spotted it before but agree with her. It's close to 270k likes at this stage.

The Curious Case Of Brad Pitt and his Girlfriends.

Here's her proof.

And there's more: