On Tuesday, Michelle Obama, took to her Twitter to post a throwback photo of her prom night challenging individuals to join in on the #PromChallenge, an effort centered around encouraging others to post their prom photos and spreading the word to teachers and students to register to vote.

Join the #PromChallenge with @WhenWeAllVote and @MTV and tell us what your school is doing to register students to vote. You could get a free prom for your school! Learn more: https://t.co/ggVjRpS3CU pic.twitter.com/x5lP0LHOUf

— Michelle Obama (@MichelleObama) February 18, 2020

The Prom Challenge is a part of Michelle Obama’s When We All Vote campaign, a nonprofit centered around increasing voter participation and closing the race and age voting gap by changing the culture around voting. The former First Lady serves as co-chair alongside Janelle Monáe, Chris Paul, Shonda Rhimes, Kerry Washington, and Tracee Ellis Ross.

When We All Vote also shared how joining the challenge could win a high school up to $5,000 in a caption on their Instagram.

“Join our co-chair @MichelleObama by showing us your own prom photo to get the word out to students and teachers about our #PromChallenge with @MTV! Tell us how you’re registering students to vote and your high school could receive up to $5,000 for an epic prom 🕺🏽🎉Click the link in our bio to learn more and submit your application by March 13th.”

Check out other celebs who joined the challenge and encouraged voter registration below:

Click here for more information about how you can take part in the When We All Vote movement.