A new trailer of the upcoming animated comedy film 'Despicable Me 3' shows that the main character 'Gru' has a twin brother 'Dru'. The film is the third installment in the 'Despicable Me' film series and a sequel to the 2013 film 'Despicable Me 2'. Directed by Pierre Coffin and Kyle Balda, it is scheduled to release on June 30.