Join Ronan Farrow for a live Twitter chat

At 12 p.m. ET Saturday, Ronan Farrow is bringing together some of today's greatest artistic minds. He'll speak with Judd Apatow, John Mayer and Carole King on art, life and the definition of "genius." During the special hour, Ronan wants you to join in. He'll be chatting live with the msnbc community as the program airs. To get in on the discussion, use #7DaysofGenius and tell us, how do YOU define genius?