Katherine Heigl’s tumultuous tenure on “Grey’s Anatomy” may have come to an end.

The 31-year-old actress did not return to the set on March 1, the scheduled end of her maternity leave. Although ABC has not commented on her absence, series creator Shonda Rhimes has agreed to release Heigl from her contract, according to EW. Heigl, who has had several public spats with producers during her six years on the show, is reportedly wants to leave the show to focus on her film career.

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In September, ABC president Stephen McPherson blasted Heigl for complaining in interviews that she was forced to work 17-hour days. At the time, Rhimes indicated that big changes are in store. “Eventually, everybody is going to leave the show,” Rhimes said. “So we’re looking at (ways) we can mess with the structure now … Season 6 is about finding the longevity of the show and figuring out if there is a future for this show beyond these characters.”

Heigl has been on maternity since she and her husband Josh Kelley adopted a baby girl in September.