Just as we heard less-than-flattering reports about why Phil Lord and Christopher Miller were fired from the Han Solo movie, dish about why Colin Trevorrow was booted from "Star Wars: Episode Episode IX" is now surfacing. And it wasn't just because Trevorrow's last movie, the critically reviled "The Book of Henry" was a flop.

The official story is that the director and Lucasfilm's "visions for the project differ." Behind the scenes, however, a well-placed source told Vulture that Trevorrow was "difficult," "unbearable" and "egotistical."

According to "a ranking Hollywood movie insider with direct knowledge of the productions on both 'The Book of Henry' and 'Jurassic World,'" Trevorrow was a nightmare on set.

Says the insider: "Because he had been personally hired by Spielberg [to direct 'Jurassic World'], nobody could say, 'You're fired.' Once that film went through the roof and he chose to do 'Henry,' [Trevorrow] was unbearable. He had an egotistical point of view — and he was always asserting that."

During pre-production on "Episode IX," Trevorrow allegedly became "unmanageable," souring his relationship with Kathleen Kennedy, who was reportedly not "thrilled with working with him anyway."

To sum up, the anonymous executive told Vulture, "He's a difficult guy. He's really, really, really confident. Let's call it that."

[Via Vulture]