Sexy Isabel Lucas might make audiences forget Megan Fox in the new ‘Transformers’

What they also got was the impossibly hourglass-shaped Megan Fox bending over the engine of hero Sam Witwicky’s bumblebee-yellow Camaro. The mechanically savvy Mikaela still holds the crown as every robotics nerd’s dream date.

But starting today, she better watch out. In “Transformers: Revenge of the Fallen,” she faces competition that comes with sweeter weaponry than the average Decepticon.

Australian hottie Isabel Lucas joins the franchise as Alice, an alluring classmate Sam (Shia LaBeouf) meets in his first days at college.

“An interesting relationship develops between myself and Shia,” Lucas, 24, has said. In interviews she remains coy about the exact nature of the characters’ bond. “I’m not allowed to give too much of that away.”

The Aussie actress landed the part after shooting an HBO miniseries, “The Pacific,” a Steven Spielberg/Tom Hanks-produced foray into World War II action that will hit TV next year. Spielberg suggested Lucas for a role in the “Transformers” sequel.