The 27-year-old actress was scheduled to host the Halloween party at 10pm at Foxwoods Casino in Connecticut but she showed up at 11:43pm, reported TMZ online.
Lohan was supposed to pose for photos and talk to the fans but instead she directly went inside the party and judged Halloween costume contest with co-host Floyd Mayweather Jr.
Foxwoods are trying to renegotiate the contract with the star.