Michelle Obama’s getting more use out of her prom dress.
Obama’s post kicks off the Prom Challenge initiative, which encourages schools to create new and inspiring ways to register students to vote.
Obama encouraged students and teachers to join the challenge by submitting innovative ways their schools are encouraging voter registration. The 20 high schools with the most creative initiatives will win up to $5,000 toward their proms.
The former first lady also invited others to spread the word and share their own prom throwbacks. Celebrities including Kerry Washington and Tracee Ellis Ross have already voiced their support.
Tom Hanks, another of the co-chairs of When We All Vote, tweeted in support of the campaign — but disappointingly, has not yet shared his own prom throwback.