Isabel Lucas Photo by: Matthias Vriens for Details Magazine
The Various Transformations of Isabel Lucas
Move over, Megan Fox. Isabel Lucas is the unsung hottie of this weekend's stupendous box-office smash, Transformers: Revenge of the Fallen.

But the Melbourne native, 24, tells Details for its June/July issue that she's more than just a pretty face. The actress describes herself as "quirky" and a big-time nature buff, who likes to hike in Los Angeles's Griffith Park – she's a fan of the "energy of the trees and air" – and spent a year of her youth in an Aboriginal community.

Then there's that open warrant for her arrest in Japan, for her participation in an anti-whaling protest. (Even though her Transformers premiere tour will take her to Tokyo, she surmises, "It's quite unlikely I'll be arrested."

While the up-and-comer seems to take life in stride, she's already earned some fairly serious credentials. She spent two years back home on the long-running Aussie soap Home and Away and hit Transformers director Michael Bay's radar after a recommendation from Steven Spielberg, who cast her in his WWII miniseries The Pacific.

Still, she isn't afraid to write her own story, even if it's all over her body: In a further quirk, she says she scribbles daily "with a word I pull out of a basket my roommate has. Just as a reminder."

ORDER NOW: Thriller: Remembering Michael Jackson, a special collector's edition
This week's cover

On Newsstands Now!

JOSH & FERGIE: ROCKED BY SCANDAL

Did he cheat with a stripper?

Married less than a year, the couple denies an Atlanta woman’s claims that she and Josh had a fling
Note that this week’s cover of PEOPLE may differ regionally

Save $1.00 off this week's issue. Click here for coupon