The dinner party in Los Angeles was hosted by the cover girl, along with Nylon Editor-in-Chief Marvin Scott Jarrett and Publisher Jaclynn Jarrett.
Joining the party was one sexy looking Shenae Grimes and her co-stars, hottie Trevor Donovan and Gillian Zinser.
Also there was Twilight├óΓé¼Γäós Casey LaBow and MTV├óΓé¼Γäós Ashley Rickards among many others.
Dianna looked stylish in a Mary Katrantzou dress, but when it got cold she covered up in an Express faux fur jacket.
The cutie partied throughout the night and served her guests a specially made pink cake which featured her Nylon cover.
Looking good, Agron!
[Images via WireImage, Michael Buckner]