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Lindsay Lohan is rumoured to be dating Paris Hilton's ex, Entourage star Adrian Grenier.
According to celebrity blogger Perez Hilton, the actress was spotted at Grenier's New York home last month and the romance is "hotting up".
They were also reportedly seen on a date at Beverly Hills' Polo Lounge earlier this week.
A source said: "No paparazzi. Since they're relationship is new, they wanna keep things as private as possible."
Grenier, who plays Vincent Chase on the hit HBO show, was thought to have dated Hilton last August, when he advised her on how to be more environmentally friendly.
However, the pair denied that they were an item, insisting that they were "just good friends".
Lohan was spotted kissing three men in as many days at last month's Capri Film Festival, where an Italian waiter claimed that she had pestered him for sex.
> Click here for our list of the most-discussed celebrities of 2007
