‘Seinfeld’ Actor — Checks Into Rehab for Pill Addiction

Breaking News 0827_john_pinette_getty

John Pinette — best known for his role as the fat guy who got mugged in the “Seinfeld” finale — has checked himself into rehab after becoming addicted to prescription medication … our sources has learned.

A rep for the venue in Canada where John was set to perform in next month says Pinette had to postpone the gig because he was checking into a rehab facility for his addiction.

The rep says John — who also had his own Comedy Central special in 2011 — underwent surgery earlier this year and got hooked to the prescription medication he was taking.

John has since tweeted to his fans about the situation — saying, “Thanks to everyone for your concern and well wishes.. Want to apologize for having missed shows last weekend, but I hope you understand!”

In case you”re not a “Seinfeld” fan (WHAT”S WRONG WITH YOU!) … Here”s his famous scene from the super disappointing finale.

At least the reunion on “Curb Your Enthusiasm” kinda-sorta-not-really made up for it.