Rebekah and her husband, Charlie Brooks, spent years trying to conceive before deciding to use a surrogate.
They are reportedly the biological parents of a baby girl due in February. It is understood the baby had a twin who died early into the pregnancy.
Rebekah's spokesperson confirmed the news with the message:
"Charlie and Rebekah are overjoyed.
"While the pregnancy has not been without its difficulties and sadness, Charlie and Rebekah are obviously hoping for a very happy ending to almost five years of trying to conceive themselves.
"Both parents are acutely aware of the infertility problems encountered by many other couples, and in the longer term hope to recognise their own good fortune by working in some way to help others facing similar challenges."
The surrogate mother has not been indentified and wishes to remain anonymous.