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The 21-year-old Australian actress, who is best known for playing Matilda Hunter in Home and Away, said that she feels a lot of "pressure" accepting a role that was made famous by Brooke Shields in the 1980s.
Evans told The Sunday Telegraph: "It is so exciting and the role did such great things for Brooke Shields, but it's also nerve-racking.
"When you do a remake, there's a lot of pressure because people always love the original. I watched it and Brooke is devastatingly beautiful, so that adds even more pressure. I'm a bit nervous."
Evans also revealed that it is "really nice" to get a big role after months of auditions in LA, saying: "I have always been ambitious about getting a US role, and if ever there is some frustration, it is still encouraging to get close to big roles because it implies there is somewhere to go.
"If I was getting nowhere with it, I think I would get more frustrated and wonder why I was doing this. This is certainly a step forward."
Current Home and Away cast member Brenton Thwaites has been cast as the male lead in The Blue Lagoon, a part originally played by Christopher Atkins. Evans said that although she hasn't met Thwaites yet, she is looking forward to spending time on set with a fellow Australian.
"We can be homesick together," she said. "There will be lots of Skype-ing with the family."
Filming on The Blue Lagoon is scheduled to start in Los Angeles and Puerto Rico later this month.
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Watch the full trailer for 1980's The Blue Lagoon below:
