The Swedish actress is reviving the Tomb Raider franchise, 15 years after Angelina Jolie debuted as Lara Croft in 2001.

And with big shoes to fill, Alicia Vikander has unveiled the gruelling exercise routine and strict diet she used to get ripped for the iconic female action hero.

The 29-year-old appeared on The Project on Thursday, where she revealed her prep was '80 per cent eating'.

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'It's 80 per cent eating!' Tomb Raider star Alicia Vikander reveals gruelling exercise routine and strict diet to get into shape to play Lara Croft

'It's 80 per cent eating, like, fish, five times a day. That's what I did. And a bowl of rice to go with it. Each meal,' she reflected.

The Hollywood star most of her workouts could be replicated at home with body weight, with footage showing her performing pull-ups, running and push-ups.

Alicia told the reporter: 'It's anything you can do with your own body weight. It's great. And you can do it anywhere, so there's no excuses.'

'You can do it anywhere, so there's no excuses': The Hollywood star most of her workouts could be replicated at home with body weight, with footage showing her performing pull-ups, running and push-ups

It's been reported Alicia gained 5.5 kilograms of muscle for the role, with the actress flaunting washboard abs and a toned physique on screen.

She appeared to be coached by celebrity trainer Magnus Lygdback, with footage on her Instagram account showcasing her incredible bicep curls with heavy weights.

Of her hardest challenge on set, Alicia claimed it was filming in 10-degree water numerous times, due to her face turning blue: 'That was the toughest. That was so hard because it's like - your brain just starts to shut down, really.'

Big shoes to fill! Alicia (L) is taking on the iconic female action role played by Angelina Jolie (R) in 2001 and 2003 flicks

Tomb Raider debuted as a video game in 1996, making Lara Croft one of the most famous characters in gamer history - with Angelina Jolie starring in two films in 2001 and 2003.

Alicia hopes to cross paths with the Oscar-winning actress in the future: 'I'm a huge fan of hers - not only as the incredible actress she is, but I admire her for being such a great filmmaker and producer - I hope that I will get the chance to meet her.'

Tomb Raider is now screening in Australian cinemas