Cameron Monaghan Is Leaving 'Shameless' Monaghan, who plays <br />"Ian Gallagher" on 'Shameless', took <br />to Instagram to tell fans that he will <br />be leaving the show after the next episode. Cameron Monaghan, via Instagram Monaghan went on to say that he had been planning to leave the show since last year but kept quiet in order to preserve the storyline for fans. Cameron Monaghan, via Instagram Monaghan is the second 'Shameless' <br />star to announce their departure <br />from the hit Showtime series. Emmy Rossum, who plays <br />"Fiona Gallagher," previously <br />announced that the current <br />ninth season would be her last.
