OK, so here's the evidence. First up is this historical photo of...well, that's Keanu, isn't it?
I mean, he used the name Paul Mounet and claimed to be an actor from France, but nope, that's Keanu. No questions.
It's not just that one photo, either. Here's a painting of Keanu Paul:
Next up, can we talk about the fact that he's not getting any older? Look back at photos of him from his Bill and Ted days and he pretty much looks exactly the same now. He's either immortal or he needs to let us know what moisturiser he's using.
And it's not just his face that is ageless; he hasn't really mixed up his style in...ever. On the red carpet, our man Keanu favours a black blazer and a t shirt. Effortless or lazy? I don't know. I guess if it works, it works.
The actor is also known for being a generous soul, often reported to settle for a pay cut so other members of cast and crew can get paid more. Surely, after years wandering the planet, Keanu has learnt that there are more important than money.
While working on The Matrix, he's reported to have 'donated' $75million to members of the special effects and costume teams. Speaking at the time, the actor said: "Money is the last thing I think about. I could live on what I have already made for the next few centuries." Well, that's handy given he's immortal and all that.
And don't for a second think this is some bizarre theory that's gained traction on weird conspiracy theory forums. No, no, no. A poll by The Tylt found that, in fact, 74 percent of people think he is immortal and who am I to argue?