Hollywood star Jodie Foster told protesters that "time boycott" in protests against Donald Trump's hard immigration policy.
Oscar-winning actors warned "attacking democracy" on Sunday night and urging people to "engage".
She is in the Joint Talent Agency (UTA) Beverly Hills headquarters outside of a crowd of 1,200 people, canceled its Oscar party to demonstrate the demonstration.
The President of the United States is trying to re-apply for the refusal of refugees and immigrants from seven major Muslim countries to enter the country after the United States court has prevented the implementation of previous administrative orders.
Silence of the lamb star said: "I am not a person feel very comfortable to use my public face for activism.
"This year is a very different year, it is time to appear.
"This is a miracle in history, it is time to participate.
"We know that the first attack on democracy is an attack on free speech and civil liberties, as well as this ruthless war on truth.
"Unfortunately, it is too familiar, because history repeats itself.
"No matter where you are born, no matter what you vote for, red or blue, whether you are white, black or brown and all the colors of the identity rainbow - this is when we resist.
"It is time for us to appear and ask for the answer, which is our time to tell us the elected officials to do their job.
Other speakers at the rally are back to the future star Michael J Fox and Oscar nominated Iranian filmmaker Asghar Farhadi, who spoke from Tehran through video.
Farhadi said earlier that he would boycott Sunday's ritual, as President Donald Trump's trip banned the results of seven Muslim majority countries.
"It is comforting that when some politicians try to promote hatred by diverging between culture, religion and nations, the film industry has joined the people in a common solidarity and declared the opposition," he said.
"I hope this unity will continue and spread to combat other injustices.
Fox, who was born in Canada, became a US citizen about 20 years ago.
He said he remembers upset in eight years, but now wants to know what he is complaining about.
Fox said the transfer of immigrants is "an attack on human dignity".
She is in the Joint Talent Agency (UTA) Beverly Hills headquarters outside of a crowd of 1,200 people, canceled its Oscar party to demonstrate the demonstration.
The President of the United States is trying to re-apply for the refusal of refugees and immigrants from seven major Muslim countries to enter the country after the United States court has prevented the implementation of previous administrative orders.
Silence of the lamb star said: "I am not a person feel very comfortable to use my public face for activism.
"This year is a very different year, it is time to appear.
"This is a miracle in history, it is time to participate.
"We know that the first attack on democracy is an attack on free speech and civil liberties, as well as this ruthless war on truth.
"Unfortunately, it is too familiar, because history repeats itself.
"No matter where you are born, no matter what you vote for, red or blue, whether you are white, black or brown and all the colors of the identity rainbow - this is when we resist.
"It is time for us to appear and ask for the answer, which is our time to tell us the elected officials to do their job.
Other speakers at the rally are back to the future star Michael J Fox and Oscar nominated Iranian filmmaker Asghar Farhadi, who spoke from Tehran through video.
Farhadi said earlier that he would boycott Sunday's ritual, as President Donald Trump's trip banned the results of seven Muslim majority countries.
"It is comforting that when some politicians try to promote hatred by diverging between culture, religion and nations, the film industry has joined the people in a common solidarity and declared the opposition," he said.
"I hope this unity will continue and spread to combat other injustices.
Fox, who was born in Canada, became a US citizen about 20 years ago.
He said he remembers upset in eight years, but now wants to know what he is complaining about.
Fox said the transfer of immigrants is "an attack on human dignity".
