From StarWars.com..
As pre-production of Star Wars: Episode VII begins, Lucasfilm has confirmed that award-winning writer Michael Arndt will write the screenplay for the new Star Wars film. As revealed in the ongoing video series posted here on StarWars.com, Kathleen Kennedy and George Lucas have begun story conferences with Arndt. Arndt won an Academy Award® for Best Original Screenplay for writing Little Miss Sunshine (2006), and was nominated for Best Adapted Screenplay for writing Toy Story 3 (2010).
For more news about Star Wars: Episode VII — slated for a 2015 release — keep checking StarWars.com.