Janice St Fort, the mother of Rio and Anton Ferdinand died on Thursday after a battle with cancer. She was 58.
A statement issued by Rio, Anton and the family described St Fort as a "devoted mother" and "an inspiration."
"We are heartbroken to announce that our amazing mum Janice passed away today after an ongoing battle with cancer," said the statement.
"She was an inspiration to us all and was loved by everyone who knew her. She died at Guy's Cancer Unit, London Bridge Hospital, with her loving husband Peter and us, her four children, at her bedside.