Big Boi and Phantogram have teamed up for their debut release as Big Grams. The seven-track EP, out September 25 via Epic, features guest appearances from Run the Jewels and Skrillex. Big Grams has been teased for months, leading up to the trio unveiling the project with a performance at Epic Records' Epic Fest at the end of August. Previously, Phantogram's Josh Carter and Sarah Barthel contributed to several tracks on Big Boi's 2012 album Vicious Lies & Dangerous Rumors.