In the months leading up to their wedding, this deeply personal film will look at the emotionally complicated dilemmas this newly formed family unit face following Rio’s wife Rebecca’s passing in 2015. For 27 year old Kate, taking on not only the role as girlfriend and fiancée to Rio, but also of ‘mum’ to three grieving children, and with the memory of Rebecca still very much present, a unique set of emotionally complicated challenges emerge. “The positive response to Being Mum And Dad in 2017 and the way it helped others going through a similar situation was overwhelming. For that reason we were both compelled to tell the next chapter in our lives together," Kate and Rio said, as they commented on the documentary. "We hope Becoming A Step Family will give a unique insight into step families and the journey through grief, whilst also providing an intimate look at our lives together.” “I’d like to thank Rio and Kate for opening up their lives to us in such an intimate and personal way. The BBC has long been committed to tackling mental health issues and Rio Ferdinand’s programme on bereavement in 2017 helped bring the conversation into the open. We hope this new film will offer meaningful insight into the reality and challenges of living in a step-family. It will also explore how grief affects us all differently," Alison Kirkham, Controller of Factual Commissioning, said.