The brother and sister, who found fame on The Only Way Is Essex, were captured peacefully sleeping next to each other as children.
Frankie shared the snap on Instagram and, captioning it, wished both Joey and her fans goodnight. She said: "Nuh night x x @joeyessex90 look at us as kids aww love you x x night Joey and all the world x x."
Joey and Frankie share an incredibly close bond, which was made stronger as children following the death of their mother, Tina.
Joey was just 10 years old and Frankie 13 when Tina took her own life and her passing understandably left the siblings devastated.
As a result, Frankie - along with elder cousin Chloe Sims - has been a mother figure to Joey and couldn't have been more proud when he won Channel 4 reality show The Jump last week.
Taking to Twitter after discovering he had been crowned the King Of The Slopes, Frankie gushed: "I can't stop crying, yes Joey! @JoeyEssex_ love you so much x x WINNER!!!"
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