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Well here’s one I didn’t see coming…ACTOR Macaulay Culkin is the mystery dad of Michael Jackson’s son Blanket, it was claimed last night.

According to the Sun, the “Home Alone” star is said to have donated sperm to help Michael Jackson create his seven-year-old son Blanket with an unknown surrogate mum.

7 Michael Jackson clips you’ve never seen

The two celebrities became friends after Culkin, now 29, shot to fame as a child in the 1990 box office smash.

Take a look at MJ with his kids:

MJ’s Top 10 trendsetting looks

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