Last month, rumors that Outkast would reunite to play Coachella this summer were all anyone could talk about. 

The duo's members, Big Boi and Andre 3000, have each had successful solo careers in recent years but it's been ages since the two were on stage together. 

Then, on Sunday night, Big Boi posted pics to his Instagram account indicating that he and Andre were chilling in ATL. 

Could this mean they're working together on something big?