Henley will reprise her role as Lucy Pevensie in the upcoming film adaptation of the novel, alongside Skandar Keynes as her brother Edmund.
"I'm so excited to be here, it's my favourite book in the series," Henley told Coming Soon. "It's a bit different, but I think change is good."
The film sees a significant cast change, with neither of the elder Pevensie siblings, portrayed in the first two films by William Moseley and Anna Popplewell, appearing in The Dawn Treader.
"I just like the idea of it being lots of different adventures, It's different to a lot of the other Narnia stories," Henley clarified.
The Chronicles Of Narnia: The Voyage Of The Dawn Treader will be released in the UK and US on December 10.