Former world heavyweight champion Lennox Lewis and actor Will Smith will be pallbearers at Muhammad Ali’s funeral on Friday. London-born Lewis, 50, became undisputed world champion in 1999, while American Smith, 47, played Ali in the 2001 film of the same name. Three-time heavyweight world champion Ali died last Friday at the age of 74 in hospital in Phoenix, Arizona. His funeral will be held in his home town of Louisville, Kentucky.