Kim Kardashian and Kanye West took North along to the March For Our Lives protest calling for an end to gun violence.
The reality star uploaded a picture of the rapper and their little girl on social media amid a sea of protestors in Washington DC.
“I’m so happy I got to share this moment with these two,” she wrote. “I hope North remembers this forever.”
The rally is urging Congress to ban assault-style, high-capacity rifles which have been used with deadly efficiency in recent mass shootings.
Kim and Kanye were among a huge number of famous faces who marched on Saturday.
Miley Cyrus, who also performed, shared photos of her and her family on social media as she vowed: “I won’t ever give up & neither will the millions that march with us today! #EndGunViolence.”
Demi Lovato, Amy Schumer, Selena Gomez Ariana Grande and Olivia Wilde are a number of other stars joining the anticipated one million people protesting across the US.
The main rally organised by pupils in the wake of the Valentine’s Day massacre at Marjory Stoneman Douglas High School is taking place in the US capital, although sibling marches are taking place across the US and world.
Kim had tweeted earlier: “So ready to March today! Landed in DC w North & Kanye.
“We stand in solidarity with the survivors of gun violence & students who are calling for action on common sense gun safety laws at #MarchForOurLives around the country.”
On Friday, Taylor Swift lent her support to the movement in a rare political statement from the US pop star while George Clooney wrote a letter to the Parkland school students.
Swift wrote on Instagram: “No one should have to go to school in fear of gun violence. Or to a nightclub.
“Or to a concert. Or to a movie theater. Or to their place of worship.”
“I’ve made a donation to show my support for the students, for the March For Our Lives campaign, for everyone affected by these tragedies, and to support gun reform.
“I’m so moved by the Parkland High School students, faculty, by all families and friends of victims who have spoken out, trying to prevent this from happening again,” she added.