Actor Alec Baldwin and director Richard Linklater were among the people who splashed into the chilly Atlantic Ocean on New Year’s Day during a pair of polar plunges in the Hamptons.

Baldwin wore a long-sleeved black T-shirt and matching trunks as he dove into the waters off Beach Lane in Wainscott during a polar plunge benefiting Phoenix House, a rehabilitation facility in East Hampton.

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Baldwin, a native Long Islander, is no stranger to charitable work on the East End. The "30 Rock" star has also participated in the annual East Hampton Artists & Writers Celebrity Softball Game, donated to Guild Hall and the East Hampton Library — and perhaps most famously, the Carol M. Baldwin Breast Cancer Research Fund, created by Alec’s mother.

While Baldwin is a fairly familiar face in the Hamptons, Linklater, who hails from Austin, Texas, just happened to be vacationing when during the plunge at a separate plunge at Main Beach in East Hampton, benefiting the East Hampton Food Pantry.

“I’ve been here years before and always heard about ‘The plunge! The plunge!’ so I decided this year, since I’m here, I’m going to finally do it,” said Linklater, whose movies include “Dazed and Confused,” “School of Rock” and “Boyhood.”

“If I’m back in town next year at this time, I would totally do it again,” he added, grinning while wrapped tightly in a towel. “This is really cool, so many people coming out for a good reason. If I’m here, I’ll probably go for it … maybe.”

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CORRECTION: A previous version of this story misidentified the plunge that Baldwin attended.