Geri Horner has proven to be every inch the doting stepmother as she marked the birthday of stepdaughter Olivia, who turned nine on Saturday.
READ: Geri Horner on baby number three with husband Christian
The star took to Instagram to share some photos of the young girl throughout her life as she marked the special occasion. In one photo, Geri carried her young stepdaughter as they flipped through the pages of the book, and it looked like Olivia was following in the singer's footsteps, as she was dressed in an adorable white dress that matched Geri's cream jumper.
WATCH: Geri Horner has a small bump as she enjoys day with kids
Other photos showed the young girl more grown-up, including one where she read a book on Mexican artist Frida Kahlo, while wearing a ladybird-like dress.
MORE: Geri Horner makes difficult personal decision following the Queen's death
SEE: Geri Horner looks like perfection in oversized figure-hugging coat
Reading isn't Olivia's only hobby, as she also enjoys horse riding, and one photo showed her side-by-side with her stepmother, while another saw her stroking one of the horses.
In a heartmoving message, Geri wrote: "Happy birthday Olivia! 9 today! We're so proud of you. Have an amazing day! We love you."
Sadly, Olivia's father, Christian, couldn't be with his daughter on her big day, as the Formula 1 team boss was required in Japan for the Japanese Grand Prix.
Olivia and Geri have a strong bond
Fans loved the sweet photos, including Geri's former Spice Girls co-star Mel C, who posted: "Happy birthday Olivia."
A second penned: "Loving the ponies! Happy Birthday Olivia," while a third commented: "Happy birthday Olivia have a lovely birthday, hope you all have a great weekend."
MORE: Geri Horner's husband Christian reveals unbelievable gift for wife – and it's too romantic for words
MORE: Geri Horner twins with son Monty or special summer outing
A fourth said: "How lucky you are kisses from Argentina, happy birthday!!" and a fifth added: "You're so sweet how you embrace and love her. Happy Bday."
Alongside Olivia, Geri is the mother of two children, daughter Bluebell, who she shares with ex-partner Sacha Gervasi and son Monty, who she shares with Christian.
Olivia celebrated her ninth birthday
Back in August, Geri and Bluebell marked a major moment, as the teenager picked up her GCSE results.
Geri wrote: "SO proud of you Blue! All A [star emojis]!! 9 GCSES! You worked so hard! You inspire me! Girl power!!!!!," alongside a picture of her daughter in school looking at her results paper.
WOW: Geri Horner looks flawless in white swimsuit as she marks birthday
LOOK: Geri Horner stuns fans with rare photo of lookalike daughter Bluebell on incredible night
The amazing achievement was met with admiration in the comments section with one fan writing: "Wow! That's incredible! Congratulations!" and another adding: "Such a smart young woman. Go Bluebell." A third commented: "A proud mama moment for you then @therealgerihalliwell."
But fans also recognised the resemblance between the two with one writing: "She is your mini version" and another adding: "Uncanny how much you two look alike."
Like this story? Sign up to the HELLO! Family Hub newsletter to get other stories like this delivered straight to your inbox.