Rich Ross on Friday quit as chairman of Walt Disney Co’s movie studio in the wake of one the studio’s biggest flops.

Ross, who had been president of the Disney Channel before Chief Executive Robert Iger promoted him to studio chief in October 2009, was unable to duplicate his successes on the TV side of the Burbank entertainment giant’s business.

Ross, who built up Disney Channel franchises such as “High School Musical” and “Hannah Montana,” had mixed results at the film studio. He inherited production of “John Carter,” a science-fiction epic whose budget grew to more than $250 million. Disney said in March it expected the film to lose more than $200 million.

“I no longer believe that the chairman role is the right professional fit for me,” Ross told his staff in an email leaked to media on Friday.

In a later statement, Iger said: “For more than a decade, Rich Ross’ creative instincts, business acumen and personal integrity have driven results in key businesses for Disney. … I appreciate his countless contributions throughout his entire career at Disney and expect he will have tremendous success in whatever he chooses to do next.”

Disney shares closed up 27 cents, or less than 1 percent, to $42.35 on the New York Stock Exchange.