Quoting multiple sources, the magazine reported Tuesday that though Jackson was married to Prince and Paris' mother, Debbie Rowe, their biological father is Arnold Klein, Jackson's Los Angeles-based dermatologist and Rowe's former boss.
'He is the dad,' the magazine quoted a Jackson insider as saying. 'He and Debbie signed an agreement saying they would never reveal the truth.'
Though neither Rowe nor Jackson ever confessed to their kids' true lineage, she did admit in 2002 that she carried his children as a personal favour and would not confirm that the marriage was ever consummated, the weekly said.
'I said: Let me do this. You need to be a dad. You have been so good to me,' Rowe was quoted as saying.
Rowe first met Jackson when she was a nurse's assistant in the 1980s.
The magazine said Klein refused to comment on whether he is the biological father of Jackson's two children.
But his attorney Richard L. Charnley has been quoted as telling Entertainment Tonight: 'Dr. Klein is aware of media reports connecting him to Michael Jackson. Because of patient confidentiality Dr. Klein will make no statement on any reports or allegations.
'Out of respect for his patients and adherence to federal HIPAA regulations, Dr. Klein asks that the media not contact his patients nor interfere with their medical treatments. Like millions of Michael's fans around the world, Dr. Klein is saddened by Michael's death and extends his condolences to Michael's family.'