Along with the launching of her new book of the same name, Billie Eilish shared a cute never-before-seen picture of herself and her brother Finneas O’Connell. 

The 19-year-old singer gave her devoted fans access to never-before-seen unique content in her latest book, Billie Eilish, by revealing the “visual narrative” of her life.

One of the pictures that Billie has posted shows her with Finneas, who is now 23 years old, when they were both very small. They are sitting in the corner wearing a pastel patchwork outfit and smiling cheekily at the camera.

The picture shows Billie with her original blonde hair, which she recently dramatically dyed in a variety of bright colors after becoming well-known.

The book is being released alongside a stand-alone audiobook, Billie Eilish; In Her Own Words, which features Billie reflecting on her incredible life to date. It comprises hundreds of never-before-seen photos from Billie’s early years to her time on tour.

Due to the songs she and Finneas wrote in their Los Angeles bedroom as kids, Billie quickly rose to fame and broke several records. She was the youngest person to write and record a James Bond theme song for No Time To Die, as well as the youngest star to be nominated for and win in every major Grammy category.

Finneas and Billie are super cute in their childhood pics (Picture: Billie Eilish family)

Billie and Finneas have broken records with songs created in their childhood bedroom (Picture: Jordan Strauss/Invision/AP)

As well as debuting her newly blonde hair recently, Billie also stunned fans with her recent Vogue cover shoot, ditching her trademark baggy clothing for a gorgeous shoot in a variety of corsets.

She revealed on the Ellen DeGeneres show that a fan had inspired her latest hair change, admitting: ‘I’ve been wanting to go blonde for a while, I don’t know what came over me.