Sunderland football club have called little Bradley Lowery 'a true inspiration' in a statement released on their website.
They say their thoughts and prayers are with Bradley's parents and his family.
In the statement they describe Bradley's 'best mate' Jermain Defoe is 'naturally heartbroken'.
Our thoughts and prayers are with Bradley’s parents, Gemma and Carl, his brother Kieran and their family and friends. We extend our love and support to them, now and always.
Bradley captured the hearts and minds of everyone at our club with his indomitable spirit, tremendous courage and beautiful smile, which could light up even the darkest of rooms. Despite battling neuroblastoma for much of his all too short life, he demonstrated a bravery and fortitude beyond his years that humbled us all. He was truly an inspiration.
His heart-warming friendship with players and staff alike epitomised the impact this wonderful little boy had on everyone he met. He had a special relationship with Jermain Defoe and their feelings for each other were evident for all to see. Jermain, naturally, is heartbroken.
Bradley’s story not only touched our club and our fans, but also the wider football community. Football can be a powerful force for good and our sport came together to embrace Bradley’s fight in a unique way. We would like to extend our sincere thanks to every club and fan who supported Bradley in recent months and showed such warmth and kindness to the Lowery’s - we are truly grateful.
Throughout his illness, Bradley’s family and friends have worked tirelessly to increase awareness of this brutal disease. Their fundraising campaign, initially for Bradley’s treatment and subsequently to raise money for the foundation that will bear his name, will ensure that other youngsters and parents facing the devastation of life-threatening illnesses will have the help and support they so desperately need.
Bradley’s passing will have a profound effect on everyone and we understand that people will want to reach out to support the Lowery’s. We would kindly ask on their behalf however, that that they are given the privacy they need as a family at this most unimaginably difficult time. We will continue to support them in whatever way we can.
His family have spoken of his funeral details on Facebook, announcing the theme of "cancer has no colours".
A look back at Bradley Lowery's short, but inspirational life in pictures, following his death from cancer at the age of six.
The friendship between Bradley Lowery and Jermain Defoe brought joy to the six-year-old through his battle with terminal cancer.