Warner Bros. Chief Executive Officer Kevin Tsujihara is leaving the studio over allegations that he had a sexual relationship with an actress he helped promote, adding to the number of Hollywood moguls toppled by scandal.

Tsujihara brings fresh upheaval to a business acquired by AT&T Inc. last year, underscoring the challenges of transforming itself from a telecom giant into a media conglomerate. John Stankey, head of the company's WarnerMedia, announced Tsujihara's departure on Monday, saying the disgraced executive had brought risk to the company.

"It is in the best interest of WarnerMedia, Warner Bros., our employees and our partners for Kevin to step down as chairman and CEO of Warner Bros.," Stankey said. "Kevin acknowledges that his mistakes are inconsistent with the company's leadership expectations and could impact the company's ability to execute going forward."