You can read the live stream of the event here at Marvel.
Hemsworth is currently filming 'The Avengers' in Cleveland, Ohio. His first day on that set was yesterday. See the pictures and video here.
"@Marvel Marvel Entertainment Like a giant storm of awesome, #TheAvengers just rocked the house at #D23Expo!"
"@Agent_M Ryan Penagos GIGANTIC, DEAFENING STANDING OVATION for Robert Downey Jr. & #TheAvengers cast at #D23Expo"
Robert Downey Jr. & Chris Hemsworth talk about working on 'The Avengers'. Well, Chris was forced to do all the talking.