According to TV Guide, actress Vedette Lim has signed on as Dr. Polly Preston, who arrives at Seattle Grace-Mercy West with a pediatric fellowship, on Grey's Anatomy this fall.
They also revealed some spoilers:
- Arizona will take an immediate liking to Polly, so much so that she'll remove Alex (Justin Chambers) from her pediatric service as a result.
- She will appear in the season 8 episode 8, entitled "Heart-Shaped Box".( click for photos and guide )