The Wonder Years is the fourth studio album by American record producer 9th Wonder. It was released on September 27, 2011 through his own label It's a Wonderful World Music Group. Recording sessions took place at Khrysis' Crib, at the Peanut Gallery in Raleigh, North Carolina, at Brightlady Studios, and at Record Plant in Los Angeles. Production was handled entirely by 9th Wonder himself, who also served as executive producer. It features guest appearances from Terrace Martin, Median, Phonte, Actual Proof, Big Remo, Bird & The Midnight Falcons, Blu, Erykah Badu, Fashawn, GQ, Halo, Heather Victoria, Holly Weerd, Kendrick Lamar, Khrysis, King Mez, Mac Miller, Marsha Ambrosius, Masta Killa, MeLa Machinko, Murs, Problem, Raekwon, Rapsody, Skyzoo, Talib Kweli, Tanya Morgan, Thee Tom Hardy and Warren G. The album peaked at number 76 on the Billboard 200 in the United States.