The 27-year-old actress co-hosted "A Night Full of Fright" Halloween Party at Foxwoods Resort Casino in Connecticut on October 31 with undefeated boxing heavyweight Floyd Mayweather, and the two seemed to be getting super close.
They were laughing and cozying up together, with Lindsay dressed as Stephen King's Carrie and Floyd channeling A Nightmare on Elm Street.
Click through the gallery to see Lindsay and Floyd spending time together and getting close at the event. Do you think they could be dating, or are they just buds? Sound off in the comments!