Read under the cut to learn more. You will have to highlight to learn about the character. Be warned that you may learn more about the character if you read the comments.
It's Krysten Ritter who played the ditzy Gia Goodman on season 2 Veronica Mars. I was looking around on her IMDb page because I saw she had a new headshot and I wanted to icon it. And what do you know? She's gonna be on GG, her first episode is the fourth episode of the new season, "'S Wonderful, 'S Marvelous." Her character is Lucy, one of two artsy students Rory befriends at an art show in that episode.
Source: Actor's IMDb as well as Spoilerfix.
Please keep on topic when replying to this post, DO NOT discuss the VM casting spoiler briefly mentioned above. I do not like to know VM casting spoilers (it's bad enough I was spoiled for the one alluded to above), I do not mind knowing GG casting spoilers. Thank you!