Ian Gallagher is a fictional character from the television series Shameless, which aired on Showtime. He is portrayed by actor Cameron Monaghan and is known for being the second youngest child in the Gallagher family. Ian is characterized by his intelligence, resourcefulness, and struggles with mental health issues. Throughout the series, Ian grapples with his identity, particularly his sexuality, as he is openly gay. His relationships, especially with Mickey Milkovich, play a significant role in his character development. Ian's journey reflects themes of love, acceptance, and the challenges faced by LGBTQ+ individuals.