Scarlett Johansson: "President Trump, I did not vote for you"

As a sea of demonstrators brought downtown Washington to a standstill, streaming past the White House in a joyous parade of pink "pussyhats," Trump launched a withering attack on the media, accusing it of downplaying attendance at his swearing-in a day earlier.

Trump did not acknowledge the mass protests that marked his first full day in office.

In a scathing address, Hollywood heavy weight, Scarlett Johansson said that she did not vote for Trump but that she accepts him as the president of the United States.

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"President Trump, I did not vote for you but that said, I respect that you are the president and I want to be able to support you...but first I ask that you support me," she told thousands of marchers.

Actress Ashley Judd also took to the stage in Washington, tearing into Donald Trump and even comparing him to Hitler.

"“I am not as nasty as a Confederate flag being tattooed across my city. “I am nasty like my bloodstains on my bed sheets," she said.

Although the US capital does not release crowd counts, organizers of the main protest, the Women's March on Washington, told AFP they estimated the turnout at one million -- quadrupling initial expectations -- with some 600 sister protests held around the globe.

"I'm part of history, and one day will tell my children about this," said 16-year-old Maria Iman, who travelled to Washington with fellow high school students from Illinois. "It feels amazing."

A tide of women and men -- teens, pensioners, parents with toddlers on their shoulders -- swelled into the streets around the National Mall for hours before flowing towards the White House in a determined show of unity.