While our girl crush radar on actress Emmy Rossum has been seriously active for quite a while now, we've fallen even deeper into obsession with the New Yorker ever since she began starring in Showtime's Shameless in 2011. And much to our delight, Rossum will be appearing on Thursday's brand-new episode of Project Runway as the panel's guest judge. This week, the remaining designers were interestingly enough asked to create looks that were inspired by butterflies, and we can't wait to see Rossum weigh in with a fresh perspective. "[Fashion] is one of the most fun things to be part of because as a woman especially, clothes can transform your whole disposition." Sing it, sister.

Watch an exclusive sneak peek of Rossum's Project Runway appearance, below, and be sure to tune into Project Runway when it airs on Thursday at 9 p.m. EST on Lifetime.

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