Rich Ross is stepping down as chairman of the Walt Disney Studios after less than three years in charge, the company said Friday.
In a letter to staff, Ross said that overseeing the studio was no longer "the right professional fit for me."
He did not say what his future plans would be but wrote that his resignation is effective Friday.
No replacement has been named.
"I know I leave the Studios in good hands and, even on separate paths, I am confident we are all destined for continued success," Ross wrote.
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The move comes roughly a month after the studio's "John Carter" became one of the biggest flops in film history, with the company projecting that the adaptation of the Edgar Rice Burroughs novel would lose $200 million.