So who will she take along on her big night?
"My mom, my dad and my brother," she said today at a luncheon for her hosted by Sally Morrison and the Diamond Information Center.
Her An Education costar, Peter Sarsgaard, also hit the Chateau Marmont to fete Carey and shared what advice he's given the Oscar nominee on how to handle the whirlwind of red carpet events...
"Don't drink a lot...not just the night before, but in between events, because you're going to drink a lot after each one!" he told me. "So save your liver."
Duly noted! Maybe she should pass that pearl of wisdom along to Shia too?
See who else was out and about in our Party Pics: Hollywood gallery!