These superheroes are getting involved in the action off screen — political action, that is. Many familiar faces from both the Marvel and DC universes attended the Women’s March on Washington and the sister marches in various cities Saturday. They were protesting President Donald Trump’s positions on various social issues.

Melissa Benoist caught the most attention with her strongly worded sign. The “Supergirl” star referenced both her Girl of Steel character and Donald Trump’s comments about inappropriately grabbing women.

“Supergirl” producer Sarah Schechter noted that this was the first time Benoist asked for time off. She flew from the Vancouver set to Washington, D.C.

Scarlett Johansson, who is set to start filming “Avengers: Infinity War” soon, also drew attention when she spoke out at the Washington march. Her speech supported Planned Parenthood, a cause she has often spoken up for, and she addressed Trump directly. “I ask you to support all women and our fight for equality in all things, including the fight to be recognized as individuals who know better for ourselves what is right for our bodies, better than any elected official, popular or otherwise,” the Black Widow actress told the crowd.

Some casts attended marches together. “Marvel’s Agents of S.H.I.E.L.D.” stars Chloe Bennet and Natalia Cordova-Buckley, who play Quake and Yo-Yo, headed to Washington together as well.

Similarly, “DC’s Legends of Tomorrow” and “The Flash” stars attended together. Caity Lotz (White Canary), Arthur Darvill (Rip Hunter), Danielle Panabaker (Killer Frost), Carlos Valdes (Vibe) and Keiynan Lonsdale (Kid Flash) showed their solidarity at the Vancouver sister march.

One of the Defenders was in Los Angeles. Krysten Ritter, who will plays the titular character in “Jessica Jones” and will reprise her role in this summer’s “The Defenders,” is vocal about her love for knitting, so it’s not surprising that she showed up wearing a pussyhat.

Brie Larson, who will likely make her debut as Captain Marvel in “Avengers: Infinitely War,” was spotted wearing similar pink knitwear in Washington.

“X-Men” actors joined marches too. Anna Paquin, who played Rogue, marched with her “True Blood” co-star Dennis O’Hare.

Many men from the Marvel and DC universes showed solidarity on social media. A few of them attended as well. Mark Ruffalo, who will reprise his role as the Hulk in “Thor: Ragnarok,” walked in the New York Women’s March.

Ian McKellen, who played Magneto in the “X-Men” films, attended a sister march in London. He held up a sign of his good friend Sir Patrick Stewart during the event.

Gabriel Luna, who joined “Marvel’s Agents of S.H.I.E.L.D.” as Ghost Rider earlier this season, also posted a photo from the march he attended.