Most immigration happens through family members who are either citizens or lawful permanent residents of the United States. To determine if there are any options available for an undocumented immigrant to obtain legal status, family is the first place to look. We want to see, first of all, if they are the immediate relatives of US citizens. Immediate relatives of US citizens include their spouses, minor children and their parents, but only when the US citizen is over the age of twenty-one.