He has been branded immortal and even a vampire thanks to his youthful good looks.

And Keanu Reeves certainly looked like he was going to be keeping people guessing about how he stays looking so young when he was out on his 51st birthday on Wednesday.

The actor didn’t look much older than he did nearly 20 years as he arrived at LAX airport.

How does he do it? Keanu Reeves looked as youthful as ever as he made his way through LAX on Wednesday

The John Wick star wore a loose fitting charcoal grey suit and a black T-shirt from Arch – the motorcycle brand he has been collaborating with.

His hair was in a messy short style and he sported some casual facial fuzz.

Keanu has been the subject of ‘rumours’ for sometime about how he remains looking so young despite his age.

Not a line on his face! The actor, who was celebrating his 51st birthday, seemed relaxed

Youthful: The John Wick star wore a charcoal grey suit and black T-shirt

He has been jokingly branded a vampire and the subject of many hilarious memes regarding his boyish visage.

The actor also seems to find the comparisons funny and suggestions she could be immortal.

In a chat with Reddit last year when someone asked him if he really was going to live forever he responded: ‘No, but energy cannot be created or destroyed so they say.’

Immortal: He has been jokingly branded a vampire and the subject of many hilarious memes regarding his boyish visage

His answer led to some his fans pondering whether he just kept reincarnating.

He was first the subject of a meme back in 2010, when the Bill and Ted star was photographed eating a sandwich looking contemplatively into the distance.

It spawned hundreds of memes and the actor revealed he thought it was amusing.

Answer: In a chat with Reddit last year when someone asked him if he really was going to live forever – he is pictured here in The Matrix

He responded: ‘No, but energy cannot be created or destroyed so they say’ he is pictured here in John Wick

However he added: ‘I think that a picture can tell a thousand words, and none of them can be right. Or true. I’m absolutely a very happy person.’

The actor will next be seen in Knock Knock, an Eli Roth movie where he plays a married man who is seduced by two young women.

His actions result in terrifying consequences.

In 2016 he is set to be seen in horror flick The Neon Demon with Elle Fanning.

Sad Keanu: He was first the subject of a meme back in 2010, when the Bill and Ted star was photographed eating a sandwich looking contemplatively into the distance – his image ended up in some very unusual situations