Nicole Tilston stood patiently watching the activity in the parking lot of Sharp Learning Center Tuesday morning. Clutching her autograph book and permanent marker close to her chest, she stared in awe from across the street as the actors entered and exited trailers of the makeshift production headquarters for "The Vampire Diaries." When star Paul Wesley walked briskly by and gave a courteous wave signaling he was too busy to stop and chat, it really didn't faze the 7-year-old from Texas.