Scarlett Johansson reveals to ET, she met up with the cast of ‘Transformers One’ for the first time in London.
Chris Hemsworth chats with ET's Rachel Smith at the premiere for ‘Transformers One,' in theaters on Sept. 20.
Chris Hemsworth, Scarlett Johansson, Brian Tyree Henry, Jon Hamm and more star in 'Transformers One,' which hits theaters on Sept.…