Credit: Ron Tom/ABC

Grey's Anatomy is known for its great guest stars, but we can't help but be even more excited than usual about Sarah Chalke's upcoming role on Season 9, Episode 19: "Can't Fight This Feeling." It’s Grey's Anatomy meets Scrubs, and we can't wait!

A set of spoiler-y sneak peek pics of the episode have recently been released, and they give us our first look at Sarah in action.

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As you can see in the photo above, all you Scrubs fans out there won't have the pleasure of seeing Sarah back in scrubs at Grey Sloan Memorial because on Grey's she's the mother of a patient, not a doctor.
 
As previous spoilers have revealed, Sarah will play a single mom who brings her kid to the hospital because, despite past misdiagnoses, she's sure something is wrong. In the end it will turn out her child has Kawasaki Disease, a hard-to-diagnose ailment that, if not treated quickly, can lead to severe heart problems. It's a very personal story, as Sarah's own son suffered from the disease.
 
Based on the uniform she's wearing sneak peek photo, it looks like Sarah's character works as a waitress, or something along those lines.

Are you looking forward to seeing Sarah on Grey's?

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Catch the next new episode of Grey’s Anatomy on Thursday, March 21, 2013, at 9 p.m. ET/PT on ABC.