Sometimes big-name celebrities walk away from the shows that help them become famous. In February, America Ferrera, who is the lead on and executive producer of NBC's "Superstore," announced she'd be leaving the show after its fifth season.
https://www.insider.com/stars-who-left-successful-tv-shows-2018-8
https://www.insider.com/stars-who-left-successful-tv-shows-2018-8