More than 500,000 students from all over the country are arming themselves with posters, pushing for lawmakers to act.
They want something to be done about gun control and violence, nationwide, after last month's school shooting in Parkland, Florida.
Students fom Western New York will be among the marchers, Saturday.
Survivors of the Marjory Stoneman Douglas High School shooting organized the event.
Sarah Lerner is 7 Eyewitness News anchor Ed Drantch's cousin. She is a teacher at Stoneman Douglas. We spoke with Lerner via FaceTime about why the day of rallies, speeches and performances is vital.
"I hope that our voices are hears and our concerns are heard," Lerner said. "I hope that policies are changed, laws are changes and things are put in place, common sense gun reform, school shootings don't have to happen anymore. I think it's important for everyone to have their voices heard and if that means freezing, walking through Washington, I'm down."
18 students from Buffalo will board a bus for DC later Friday night and get there just ahead of the march Saturday morning.