Singer Sheryl Crowe's wears a "War Is Not the Answer" T-shirt.
Actor Sean Penn has made a trip to Baghdad to discover for himself how Iraqis deal with their day-to-day lives after 12 years of UN sanctions on the country.
Fellow actress Anjelica Houston says: "I speak out as a proud American. I praise the struggle to maintain the openness and just spirit that has been the mark of a democratic America. I speak out with the loud voice that my conscience demands of me."
They are just three Hollywood personalities who are taking a very public stand against war.
But this - as far as some are concerned - is just spittle flying in the public eye.
And they are being slammed as anti-American -- even "Taliban".
Martin Sheen, who plays the US President in the Emmy-award winning series "The West Wing," is the chief spokesman of the anti-war coalition.