Dozens of people on Twitter are writing digital and handwritten love letters for Valentine’s Day, and they’re signing them with #ToImmigrantsWithLove.

The letter writing campaign was first launched in December by Define American, a non-profit pro-immigrant organization, and Welcome.us’ I Am An Immigrant movement. On Tuesday, the campaign revived their hashtag for what they’re calling a Day of Action.

The organizations asked supporters to show solidarity with immigrants by recording a video on their website or by writing letters and sharing them on social media using the hashtag #ToImmigrantsWithLove.

“There’s never been a more important time in modern U.S. history to stand in solidarity with immigrants across our country,” undocumented activist Jose Antonio Vargas, founder and CEO of Define American, said in a press release. “This campaign comes at a crucial time not only for millions of immigrants who call America home but for the millions of American citizens and permanent residents whose lives are connected to ours. We are an immigrant nation and we love our immigrants. Let’s show it.”

Immigrants have become increasingly vulnerable under the Trump administration with undocumented immigrants being targeted by a recent uptick of Immigration And Customs Enforcement raids across the country. In January, the president also attempted to limit the number of travelers and refugees from seven Muslim-majority countries with an executive order, which has since been temporarily blocked by a federal judge.

Politicians, celebrities, activists and more shared their messages of love for immigrants on Tuesday, including Russell Simmons, Constance Wu, Debra Messing, George Takei, singer Estelle, U.S. Representative Judy Chu and U.S. Representative Jamie Raskin.

Take a look at some of our favorite photos and letters #ToImmigrantsWithLove below.

My father was an immigrant and my mother's parents, too. Immigration made this nation strong and will keep it strong. #ToImmigrantsWithLove pic.twitter.com/pyE1YQ2pZh — George Takei (@GeorgeTakei) February 14, 2017

#ToImmigrantsWithLove Sending Love &a Appreciation for everything your do for our country every day. ❤ pic.twitter.com/OpvWBTQQ59 — Debra Messing (@DebraMessing) February 14, 2017

On #valentinesday I send love to my Irish dad, who marched with us in DC, and is a fierce defender of human rights. #ToImmigrantsWithLove — olivia wilde (@oliviawilde) February 14, 2017

A #valentines message to refugees & immigrants: Maryland is still the Free State, welcoming, inclusive, & just. #ToImmigrantsWithLove pic.twitter.com/7uqIz5Vi0a — Rep. Jamie Raskin (@RepRaskin) February 14, 2017

#ToImmigrantsWithLove - "Happy Valentine's Day" to those who left their Loves to come to another country and get it going for the better.❤️ pic.twitter.com/31SRIMQRfx — Estelle (@EstelleDarlings) February 14, 2017

I am a proud immigrant!! To my fellow immigrants thank you for the amazing work you do every day #ToImmigrantsWithLove pic.twitter.com/8Oc2ej41Zq — José Andrés (@chefjoseandres) December 19, 2016

#ToImmigrantsWithLove "Do you know what a foreign accent it? It's a sign of bravery." pic.twitter.com/TXfAnkD9D7 — Maria Praeli (@mariapraeli) December 15, 2016

Boston is a city of inclusion, a city of compassion, a welcoming & diverse city that values & respects immigrants. #ToImmigrantsWithLove pic.twitter.com/5UlfD2KkMQ — Mayor Marty Walsh (@marty_walsh) December 15, 2016

A lot of fear in immigrant communities across America @defineamerican is encouraging everyone to write letters #toimmigrantswithlove 🙌🏼❤️🗽 pic.twitter.com/IrzpE2bYqN — maeve higgins (@maevehiggins) December 15, 2016

My abuela came to the US when she was 60 to marry her penpal. They wrote love letters to each other for 8 years #ToImmigrantsWithLove (more) pic.twitter.com/anCjtClml9 — Paola Mendoza (@paolamendoza) February 14, 2017

On #ValentinesDay, I write this letter to the love of my life, @PaolaMendoza, who came to this country at 2 years old. #ToImmigrantsWithLove pic.twitter.com/Fosb4SToXA — Michael Skolnik (@MichaelSkolnik) February 14, 2017

Roses are picked by migrants,

Violets are too,

The workers so reliant,

Our gratitude long overdue. #ToImmigrantsWithLove — Esther Lee (@EstherYuHsiLee) February 14, 2017

"You inspire me to work harder & cont. fighting for justice. As a child of immigrants I wouldn't be here w/out you." #ToImmigrantsWithLove 💕 pic.twitter.com/8LGbwvl2Ql — SF Immigrant Affairs (@OCEIA_SF) February 14, 2017