Celeb Twitter Pics: Castle Parties With Parks and Rec, Charlie Sheen Flashes His Undies

Our favorite celebrities continue to offer more glimpses into their personal and professional lives through that miraculous invention called Twitter!

For example, 2013 Writers Guild Awards host and Castle heartthrob Nathan Fillion got his groove on with Parks and Recreation stars Adam Scott and Amy Poehler at the big event on February 17. We’re officially jealous of all involved in this Twitpic.

Click through for the rest of the snapshots!