I could not conceive that [fans] actually wanted me to sign something. It took a long time for me to figure out (a) just say 'Thank you' and sign the thing, and (b) smile in the picture, because if you try to just half-smile you're going to look constipated.

About Joss Whedon

Joseph Hill "Joss" Whedon ( WEE-dən; born June 23, 1964) is an American screenwriter, director, producer, comic book writer, and composer. He is best known as the creator of several television series: the supernatural drama Buffy the Vampire Slayer (1997–2003) and its spinoff Angel (1999–2004), the short-lived space Western Firefly...