'This isn't just chitter-chatter, even Culkin suspects he's Blanket's father. So many names have been mentioned as prospective dads and this is probably the wackiest yet... But Jackson and Culkin were best friends. He was one of the few people Jackson really trusted and Mack never let him down. Really, Jackson idolised him - that's why he asked Mack to donate sperm,' the source said.

'Deep down, I think he always wished Mack was his son. Creating Blanket was the next best thing,' the source added.

Friends claim the King of Pop, who died in June, was not the biological father of his other children Prince Michael I, 12, and Paris, 11.