Singer and actress Miley Cyrus arrives at the 2008 CMT Awards in Nashville.
Gossip Girl producers Josh Schwartz and Stephanie Savage are said to have signed onto the show. Blake Lively, 24, who plays Serena van der Woodsen on Gossip Girl, is also in the race to land the part.
Emma Roberts, 20, and Hugo star Chloe Moretz, 14, could also be in with a chance to star in the episode.