Holly Willoughby's sister has revealed her sweet nickname for the star as she celebrated some big personal news.
The This Morning star announced on Monday that she is set to release a book after teasing a 'secret project'.
The book has been described by Holly as "thoughts and musings" from her on "inner and outer beauty."
She said that "writing is such a personal process and between these pages you will find many little pieces of me," as she revealed the cover of the book, titled Reflections.
The mum-of-three goes on to explain how she's finally at a point in my life where I can see a little more clearly," before continuing: "And I want to share my truths in the hope that maybe they’ll help you too.
Holly was flooded with supportive messages about her latest venture with the book due to be released later this year.
Among those to offer their congratulations publicly was This Morning co-host Phillip Schofield who released his own deeply personal autobiography last year.
But also among those to leave a comment on Holly's Instagram post was her older sister, Kelly.
She said: "Beyond wonderful..." before giving a nod to her sweet nickname for her younger sibling.
"Beyond proud of you Dolly," she added.
Kelly, 42, also happens to be a children's writer and had the help of her sister back in 2013 when they co-wrote a children's book together.
The School for Stars series was centred around twins Molly and Maria which Kelly previously revealed were based on her and Holly.
Holly ended her announcement post by saying: "I can't wait to share it with you all and yet can’t help but feel nervous at the same time...
"I think the more important something is... the scarier it feels... deep breath... I hope you enjoy it.... #reflections."
