Claim: Big Boi join Outkast February 1, 1975.
Evidence: Antwan André Patton -LRB- born February 1 , 1975 -RRB- , better known by his stage name Big Boi , is an American rapper , songwriter , actor and record producer , best known for being a member of American hip hop duo Outkast alongside André 3000.
Outkast -LRB- stylized as OutKast -RRB- is an American hip hop duo formed in 1991 , in East Point , Atlanta , Georgia , composed of Atlanta-based rappers André `` André 3000 '' Benjamin -LRB- formerly known as Dré -RRB- and Antwan `` Big Boi '' Patton.