In August 2002 Ian Huntley killed Holly and her friend Jessica Chapman. Both were 10-years-old at the time.
Now Nicola and Kevin Wells have given an emotional interview, admitting Holly would’ve been an aunty now.
They said: “After losing Holly we both witnessed and experienced the effects that bereavement and the grieving process can have on your life.
“We will never forget Holly but life does move on – it has to – and the intensity of your grief does diminish as the years pass.”
Kevin, 51, announced he is going to trek along the Great Wall of China in aid of charity Grief Encounter.
He and Nicola, 48, revealed Holly’s brother Oliver, 25, and his partner Lydia have an 18-month-old baby son called Ethan.
Their second child is due in June – two months before the 13th anniversary of Holly’s death.
The bodies of Holly and Jessica were discovered on 17 August 2002, a fortnight after they went missing.
Ian Huntley was sentenced to two terms of life imprisonment in December 2003. His girlfriend Maxine Carr, the girls’ teaching assistant, was sentenced to 21 months in prison for perverting the course of justice after she gave Ian a false alibi.