Chris Hemsworth and his brother Liam regularly get mistaken for each other.

Liam and Chris Hemsworth

Liam and Chris Hemsworth

The 'Avengers: Age of Ultron' star admits people tend to confuse him for his younger brother, despite their six-year age gap.

Recalling the first time it happened, he told The Graham Norton Show: "Now I have a beard it happens more. The first time was at the Star Trek premiere. It was the first big thing I had done and I remember thinking, 'Wow, this is the beginning of my career,' and a bunch of people were there and they're like, 'Chris, Chris, Chris', and then ran straight past me to Liam.

"I thought he was going to correct them but he just winked at me and started signing autographs! That was my first little brush with fame!"

Meanwhile, Liam previously revealed him, Chris and their brother Luke, 35, are all incredibly "competitive".

The 'Hunger Games' star said: "I was the youngest, so I was never really anywhere near their physicality. If they wanted to beat me up, they would. But I idolised them. As a kid, I followed them into anything and wanted to do whatever they were doing. And it was always competitive.

"I went and watched [Chris] on set one day and I clearly remember something snapping in my mind. It was like, 'Yeah, I want to do this.' It was definitely the goal. Before I even started working on 'Neighbours' in Australia, I was already thinking about Los Angeles."