People are 'baffled' after realising Hannah Montana actor is same age as John Cena

The main source of shock in the pop culture online world today is that a certain Hannah Montana actor is the same age as his one-time co-star, the wrestler-turned-actor John Cena.

The smash hit Disney series Hannah Montana first debuted in 2009, and defined a lot of our childhoods.

It followed the life of by all means 'normal' teenage girl Miley Stewart - played by none other than Miley Cyrus - who masqueraded as pop sensation Hannah Montana, unbeknownst to her friends and the general public.

Miley adopted the alter ego of Hannah Montana in order to be able to live a normal, fame-free life when she's off the stage.

Hannah Montana was on our screens from 2009-2011. (Amy Sussman/Getty Images)

The difference between Miley and Hannah is simply a blonde wig.

Yeah, it was far fetched, but we loved it.

It made a star of Miley Cyrus, who of course went on to be the 'Flowers' hitmaker we all know and love today.

Hannah Montana also starred Cyrus' real-life father Billy Ray Cyrus as her on-screen dad. Her best friends were played by Emily Osment and Mitchel Musso as Lilly Truscott and Oliver Oken, respectively.

Miley's big brother Jackson Stewart was played by Jason Earles.

In Hannah Montana, Miley Stewart is a 14-year-old girl with her two best friends being the same age, and her brother was a 16-year-old.

John Cena, 47, made a cameo as himself during the series run, and was 30 at the time.

So, which cast member was also 30 in real life, despite portraying a teen?

Drum roll please...

It was in fact Miley's older brother, Jackson.

Yep. Despite playing a 16-year-old boy, he was in fact 30 in real life when filming that specific episode - which was the same age as John Cena.

John Cena and Jason Earles were both 30 when this picture was taken. Yes, really. (Eric McCandless/Disney Channel via Getty Images

It turns out John Cena is older, but only by three days. *Gasp*

It has completely shocked the internet, with one person writing: "Hold on! He was 30 playing a high school kid in Hannah Montana!!"

Another said: "They look like father and son, how are they same age?"

And a third chimed: "This does not sit well with me."

It's going to take a while for that to sink in, but in the meantime we need to know what moisturiser he was using.