Spencer Pratt and his sister, Stephanie Pratt, may share a last name, but like most siblings, they don't always see eye to eye. From navigating reality TV fame on MTV's The Hills to public feuds and reconciliations, their relationship has gone through many ups and downs through the years. Although they are brother and sister, they have often seen the world through a very different lens as highlighted by Stephanie's recent commentary against his bid to become the mayor of Los Angeles.