The first one bites the dust.

Comedian Devon Walker has announced his exit from “Saturday Night Live” after three seasons, just days after creator Lorne Michaels teased a Season 51 cast shakeup.

Walker, 34, shared the surprising news on Instagram Monday night. He compared his job on the NBC sketch comedy show to a relationship, and admitted that it was “toxic” at times. 10

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“To me, jobs in this industry feel like a bunch of little marriages,” he began. “Some of em last for a long time if we’re lucky, but most of them are fleeting. Permanent until they’re not. That’s the deal. You know what it is it when you sign up.”

“Me and the show did three years together, and sometimes it was really cool,” Walker continued. “Sometimes it was toxic as hell. But we did what we made the mos

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