Some celebrities say they’ll participate as well like Scarlett Johansson and Katy Perry. It is the first time filmmaker Rebecca Rodriguez has wanted to join a march, because she thinks Trump is unfit to be president.

“I see an individual who with his words has encouraged hate and violence against the marginalised communities in our society,” says Rodriguez.

For the participants, there’s a multitude of motivations: gay rights, gun control, immigrant rights, equal pay, abortion rights, racial justice, or climate change. While the event is also open to men it has been organised predominantly by women.

“The people who are going to be the biggest thorn in this administration’s side are going to be the women of this nation,” says Women’s March National co-chair Linda Sarsour.

So looking forward to the Women's March On Washington... "The Time Is Always Right To Do What Is… https://t.co/8BGX2Xvx5m

— Rosario Dawson (@rosariodawson) 16 gennaio 2017

The motive for this women’s march, which went viral on social media, is Trumps’ past controversial comments about women. They came under scrutiny during his election campaign in 2016, notably this from 2005.

“I’ve got to use some Tic Tacs just in case I start kissing her. You know, I’m automatically attracted to beautiful women, I just start kissing them. It’s like a magnet. And when you start, they let you do it. You can do anything,” said Trump to a TV show host.

The march in Washington will not be the only one: hundreds of simultaneous protests are expected across all US states and support marches are planned in more than 30 other countries, from Colombia to Myanmar, Iraq to Saudi Arabia.

Janelle Monae & more performers announced for #WomensMarch https://t.co/75kcBshMGw pic.twitter.com/oELL3GgFKE

— billboard (@billboard) 18 gennaio 2017

According to Media reports more than 10,000 people alone will attend the march in London, probably one of the biggest outside the United States.

Amongst the worldwide protesters are all kinds of activists. But the most popular one is California’s Pussyhat Project, hand-knitting pink hats that thousands of participants in DC are expected to wear.

“Every time I think ‘Ok, that’s enough. I’ve made enough (hats), I’m going to stop’ I read something in the news (about Trump) … and give me that yarn! I’m making more! I don’t want anyone who wants a hat to go without one,” says knitter Marina Mont’Ros.

These women do not intend to stay silent and be left behind. They intend to get ahead, with a hat. (Euronews)

9 men on why they’re joining the Women’s March on Washington https://t.co/aKVxkzuxoV pic.twitter.com/s8grhNlu8v

— Huffington Post (@HuffingtonPost) 17 gennaio 2017

Passing out 17 x 30" #WeThePeople prints at @subliminal_art this FRIDAY for this Saturday's #WomensMarch. More info: https://t.co/ayszFejh4U pic.twitter.com/FLJsc9a3Gb

— Shepard Fairey (@OBEYGIANT) 18 gennaio 2017

1/3 The march in London on Saturday, it's not a women's march is it? It is an anti-Trump March, about all his policies not just those

— Julie Bindel (@bindelj) 19 gennaio 2017

How these Los Angeles-born pink hats became a worldwide symbol of the anti-Trump women's march https://t.co/VdkO8PJg9J pic.twitter.com/XbV3eB2Sf9

— Los Angeles Times (@latimes) 16 gennaio 2017