"Wedding Reception Montauk Style #ChAnna @shagwong_tavern," Jerry captioned one image, shortly after stating the venue had thrown the "Best Wedding eva."
Jerry also publicly congratulated the couple and shared an Instagram photo of Charlie embracing and dancing with the Playboy Playmate at their wedding reception, which took place at Shagwong Tavern.
Anna apparently donned a form-fitting lacy white dress with spaghetti straps, while the groom sported a black tuxedo with a polka-dot bow tie.
"I'm the best man -- we're all super stoked. It's great," Jerry, 44, previously told People about Charlie and Anna's nuptials. "She's a beautiful girl, she's so nice. I can't wait for him to join the married club."
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Charlie and Sarah first split in 2007, but they resumed their romance the following year, when Sarah admitted the breakup had been due to Charlie's excessive drinking and her desire to be more independent.
The former couple eventually called it quits for good on their relationship in 2010.