In a video obtained by TMZ of Saturday night’s event, Affleck seemed to have trouble walking while leaving his hotel for the ball.
Photos from the night show the star wearing a dark suit and a Halloween skull mask over his face.
“Sobriety is difficult and elusive for everyone struggling with addiction,” a friend of Affleck previously told PEOPLE after the footage from the ball was published.
“I’m making a donation today because there are people battling addiction every day that don’t have the resources and need help,” he continued.
He stayed at the center, with only brief breaks to work out at home and attend business meetings, until October when he broke his silence about his treatment in an emotional statement on Instagram.
“This week I completed a forty-day stay at a treatment center for alcohol addiction and remain in outpatient care,” Affleck revealed in the Oct. 4 post.
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- Sobriety Setback ...TMZ
- Ben Affleck Stumbles in Halloween Costume and Sparks Concerns About His SobrietyE! Online
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- Ben Affleck looks refreshed as he stops by ex-wife Jennifer Garner's house after apparent sobriety setback following a ...Daily Mail
- Ben Affleck Reportedly Falls Off The Wagon, Appeared Intoxicated At Halloween Party One Year After RehabThe Inquisitr