Alice is back in Disney’s live-action sequel to 2010’s Alice in Wonderland, and this time, she’s going through the looking glass.

“Alice has become a boss,” Anne Hathaway, who plays the White Queen, explains in ET’s exclusive behind-the-scenes look at Alice Through the Looking Glass. “She’s following her dreams, she’s doing impossible things. She’s pretty fearless, and she’s what we would call a modern woman.”

WATCH: Alice (and Johnny Depp’s Mad Hatter!) Are Back in 'Through the Looking Glass' Trailer

In the film, Alice (Mia Wasikowska) has to return to Wonderland to rescue her friend, the Mad Hatter (Johnny Depp), an intense mission that, according to the film’s director, James Bobin, showcases the fairytale protagonist as the true hero she was meant to be.

“Lewis Carroll was really the first person to put a girl as the hero of a book,” Bobin says of the Alice author. “He was very keen to kind of convey the girls that he knew, and their strengths. I think Mia helps that character to be the character Lewis Carroll wanted her to be.”

For her part, Wasikowska says she was “quite excited” to reprise her role, returning alongside Wonderland stars Hathaway, Depp, and Helena Bonham Carter, as well as voice actors like Michael Sheen, Stephen Fry, and the late Alan Rickman in his final role.

“Alice is a great character,” the actress gushes. “She’s very much her own person.”

MOVIES: Alan Rickman's Iconic Voice Brings Chills in 'Alice Through the Looking Glass' Teaser

Hathway agrees, adding that the sequel was something of a dream come true.

“I got to work with the most fun people I’ve ever worked with, and all of it in Wonderland,” she marvels. “What more could you want?”

Alice Through the Looking Glass hits theaters on May 27.

WATCH: Johnny Depp Returns as the Mad Hatter in First 'Alice Through the Looking Glass' Trailer