Gallery: You Probably Had No Idea That These 45 Celebrities Were Adopted

Adoption is far more common than you think it is. Children are separated from their biological parents every single day for numerous reasons — choice, death, relationship circumstances and even strange laws. Public figures are certainly no exception. 

Whether it be Marilyn Monroe, Nicole Richie, Bill Clinton or Jesse Jackson, we've compiled a list of 45 celebrities you probably didn't know were adopted. (We know we didn't!)