On a 2013 episode of Watch What Happens Live, Oprah Winfrey told Andy Cohen that she last smoked marijuana in 1982. "I hear it's gotten better," Winfrey coyly quipped.
Update: On the May 9 episode of The Ellen Show, Gayle King told Ellen Degeneres that "Oprah has also smoked a little marijuana too" (cue to 3:10). King just didn't say when, but most likely it has been since 1982.
