Disney Channels Worldwide president Rich Ross has been named chairman of Walt Disney Studios, Variety reports. He replaces Dick Cook, who left Disney in mid-September after 38 years at the company. Ross will oversee production, distribution and marketing for Walt Disney Pictures, Touchstone, Miramax and Disney/Pixar. He will also be in charge of Disney’s theatrical and music operations. Ross will report to Disney president/CEO Bob Iger.