Entertainment photo agency WireImage showed guests at the Socialista event, including Madonna,
Gwyneth Paltrow, Ivanka Trump, Liv Tyler, Catherine Keener, Lucy Liu and Salma Hayek.
Other celebrities reported at Socialista were Javier Bardem, nominated for a best supporting actor Oscar, Eric Dane, Rebecca Gayheart and fashion designer Roberto Cavalli.
Socialista was not immediately available for comment, nor were representatives of Moore, Kutcher or Madonna.