Catherine, Duchess of Cambridge, formerly known as Kate Middleton, and her sister, Pippa, will have an hour-long E! True Hollywood Story devoted to them.

E! True Hollywood Story: Kate & Pippa will air on Oct. 12 at 10 p.m.

E! True Hollywood Story paints a portrait of these dynamic siblings who have captured the affection of millions around the globe, the network said in a statement. From their quaint childhood, through their times on the London social scene and finally to where they are today, THS reveals the remarkable story of two beauties who rose to celebrity status in the most magical way. 

While Kate came into the international spotlight when she began dating Prince William, younger sister Pippa captured much attention at the royal wedding in April. Both sisters are renowned for their fashion sense. 

Royals author Claudia Joseph was interviewed for the special, the Los Angeles Times reported.

You can see the warmth between them, Joseph said, the LA Times reported. They spend a lot of time together. When Kate and William broke up, it was Pippa she went on the town with.