Holly Willoughby took to Instagram to share a never-before-seen family photo with her fans on Sunday.MORE: Holly Willoughby's sizzling swimsuit selfie causes a stirThe This Morning star shared a touching personal post in honour of Father's Day – and sparked quite the reaction amongst her fans. WATCH: Holly Willoughby shares peek inside living room in London homeHolly and her older sister Kelly both chose to share the same throwback photo on their Instagram accounts, a throwback picture taken when they were young.READ: This Morning's Holly Willoughby shares rare photo of son HarryMORE: Holly Willoughby admits she regrets this one thing about her weddingThe sweet snapshot shows the girls sat either side of their dad, Brian, with Holly beaming for the camera while holding a soft blue duck while Kelly is lovingly looking at her younger sister, while cradling a baby doll in her arms.