The "Manchester by the Sea" actor hosted "Saturday Night Live" over the weekend.

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Actor Casey Affleck hosted “Saturday Night Live” on Saturday, Dec. 17, and got to use his Boston accent in an amusing takeoff on the donut chain’s recent advertising campaign using real customers.

“You want to talk real customers?” said Ben Affleck’s younger brother, holding a cigarette just barely outside the door. “Kid, that’s me. I’m like the mayor of Dunkin’s. This is the face of Dunkin’ Donuts right here.”

Watch the entire skit below: