"Extra" caught up with "Sex and the City" star Cynthia Nixon at a fundraiser for the Leukemia and Lymphoma Society, where she told us there's no truth to rumors that the girls aren't getting along on set.

"We're having fun," she said, shooting down reports of catfights and diva behavior.

Cynthia and her "Sex" co-star Evan Handler took New York by storm this week to raise money for the charity event, which is dedicated to funding blood cancer research, education and patient services.

For more information on the Luekemia and Lymphoma Society or to find out how to donate, click here.