Sharif's last term as Prime Minister ended in 1999 when then Army Chief Pervez Musharraf carried out a bloodless coup.
In a dramatic fall from grace, Sharif ended up in jail, convicted of hijacking charges for trying to stop a plane carrying Musharraf from landing.
He then went into exile in Saudi Arabia and didn't return to Pakistan until 2007, when he teamed up with the PPP to force Musharraf from office.