It’ll be a star-studded season of guest appearances on 30 Rock this Fall. Jennifer Aniston is already shooting a guest spot on the hit NBC series; and the Queen of Talk herself, Oprah Winfrey, up for a cameo on the show. Now Gossip Girl frenemies Leighton Meester and Blake Lively are aboard to share the screen with Emmy-nominated funny lady Tina Fey on an episode of 30 Rock this November.

Former Blake and Leighton, who play “Serena” and “Blair,” respectively, on The CW series Gossip Girl, will play a pair of high school classmates of Liz Lemon’s in a flashback sequence, according to an inside scoop from Entertainment Weekly.