Lauren Conrad by Jordan Strauss/ WireImage.com
As if Greek's Casey doesn't have enough to contend with during the upcoming 10 episodes - what with her sorority presidency being seriously challenged and all - in the Oct. 28 season finale, she will find herself presented with quite the Sophie's Choice.

Or, perhaps more accurately, an LC's choice. And helping the coed make the tough call will be The Hills star Lauren Conrad, guest-starring as herself.

The set-up: When Casey is forced to decide between something being offered by a fella in her life and something being proffered by a woman in her life, she drifts off into dreamland to pose the question: "What Would LC Do?" (Yes, pity the person who turns to that hallowed one in a time of crisis.) Conrad, having stared down a similar quandary herself on The Hills, offers her two cents.

LC's guest gig was first reported by EW's Ausiello. Greek returns Aug. 26. - Matt Mitovich