The Scary Movie 5 actress was apparently spotted canoodling with Cavin at a party in New York's Little Italy over the weekend.
An eye-witness claimed that the pair were acting very much like a couple, but Calvin has now clarified to TMZ that he and Lohan are not romantically involved.
"Lindsay and I are just friends. We are not dating," Cavin stressed.
He added: "She comes to a bunch of my DJ gigs. Sunday she came and was hanging in the booth."
Lohan is coming off an apparent romance with The Wanted's Max George, whom she followed on tour in the US and then back to his UK home.