Inside Kym Marsh's celebrations for daughter Polly's 13th birthday – 'The light in my darkness'

Actress Kym Marsh has posted a heart-warming birthday message to her daughter.

In an emotional Instagram message, the mum said she "can't believe how fast time has gone" as her daughter Polly turns 13.

The 47-year-old shares her eldest children David and Emilie, with ex fiancé David Cunliffe

Kym later welcomed Polly, with ex-husband Jamie Lomas, they tragically lost their son Archie when he was born 18 weeks early in 2009.

Sharing a collection of nostalgic photographs of Polly as a baby and child, Kym said that she is the "light" to her "darkness."

She said: "And just like that…..she was 13!!!!! I can’t believe how fast time has gone by!

"Feels like yesterday when I gave birth to that tiny 4lb 1oz premature baby. The baby we had dreamed of, longed for. Our rainbow baby.

"Polly you are so very special. For so many reasons. You brought me everything. The light in my darkness, the sun through my rain clouds, the joy after the pain.

"You have given us so many special memories over the years, it’s been a pleasure to watch you grow into the beautiful young lady you are today.

"Don’t get me wrong….you’re also a pest at times. you aren’t always an easy customer and boyyyyy do you have a temper!!! Hahah (wonder where you get that from?) hahah! But Polly we would never change any of it.

"You are our perfect girl and we adore you. Thank you for being so brilliant, quirky, funny as hell!, feisty, challenging, talented, loving and most of all thank you for being you.

"I am so proud to be your mum. Today we celebrate you! Happy birthday gorgeous girl. Love you always and forever."