Macaulay Culkin a Jacko sperm donor?

The death of Michael Jackson has opened many a can of worms when it comes to the parentage of his three kids. Maybe he was right to put masks on them whie he was alive because now the press is foaming at the mouth for dirt.

The Sun now claims that actor Macaulay Culkin is the mystery dad of Jackson’s youngest son Blanket. The paper claims Culkin donated sperm to father Prince Michael II, age 7, aka “Blanket.”

Jackson and Culkin became friends after the younger man shot to fame in “Home Alone” in 1990.

“It is well known Jackson and Macaulay shared a unique bond,” said a source. “Now rumors are spreading like wildfire that Macaulay, who Jackson nicknamed Mack, is actually Blanket’s biological dad.”

Reports have circulated since Jackson’s death in June that he isn’t the biological father of any of his kids, including Blanket, his brother Michael, 12, or their 11-year-old sister Paris.

Now sources close to Jackson say the Thriller star asked Culkin for the donation to help him complete his “perfect” family.

“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,” added the source. “Really, Jackson idolized him. That’s why he asked Mack to donate sperm. Deep down, I think he always wished Mack was his son. Creating Blanket was the next best thing.”

Culkin is godfather to Jacko’s other two children and has refused to comment on the matter.

Yesterday Jackson’s brother Marlon appeared to confirm the star did not conceive his children naturally.

He said: “Those were Michael’s kids – regardless of where they came from.”

Jackson will be buried on Thursday in a gold-plated coffin in the Hollywood Hills.