Director-writer Jared Bush is replacing Jennifer Lee as chief creative officer of the Walt Disney Animation Studios as Lee returns to filmmaking full time at the company and stewards the Frozen franchise, Disney announced Thursday. He’ll report to Disney Entertainment co-chairman Alan Bergman, effective immediately.

Walt Disney Animation Studios, in a significant leadership shift, on Thursday named Academy Award-winning filmmaker Jared Bush as its new chief creative officer, effective immediately.

As Disney readies the sequels to its uber-grossing $1.75 billion Frozen franchise, Walt Disney Animation Studios Chief Creative Officer Jennifer Lee is segueing from her position to direct and write Frozen 3 and pen Frozen 4 with Marc Smith.