Ian Clayton Gallagher was born in 1996 in Illinois, and is the third oldest child in the Gallagher family. He is presumably the product of a PCP-fueled affair between his mother Monica Gallagher and Frank Gallagher's brother, Clayton Gallagher, in the summer of 1995. Ian has been diagnosed with Bipolar Disorder; he currently refuses to visit the doctor and does not believe he needs to take medication. For these reasons his behavior has been erratic and out of control, worrying his family. 