The biggest addition to the cast of Grey's Anatomy in Season Four is the cute Chyler Leigh, who plays Lexie Grey, sister of Meredith Grey. We're looking forward to seeing where this character is headed.
MEREDITH: "You don't get to call me a whore. When I met you, I thought I had found the person that I was going to spend the rest of my life with. I was done! All the boys and all the bars and all the obvious daddy issues, who cares? I was done. You left me. You chose Addison. I'm all glued back together now. I make no apologies for how I chose to repair what you broke. You don't get to call me a whore." DEREK: "This thing with us is finished. It's over." MEREDITH: "Finally." DEREK: "Yeah, it's done." MEREDITH: "It is done."