In this third installment in the 'Shrek' franchise, King Harold (John Cleese) has fallen ill and its now up to Shrek (Mike Myers) and Princess Fiona (Cameron Diaz) to become King and Queen of Far, Far Away unless they can find a suitable heir. Now Shrek, with the help of Donkey (Eddie Murphy) and Puss in Boots (Antonio Banderas), have found the most promising candidate for the job, Fiona's slacker cousin Artie (Justin Timberlake), who proves to be more of a challenge than they bargained for.