Though Michael Jackson was wed to Prince and Paris' mother, Debbie Rowe, their biological father is Arnold Klein, Jackson's L.A.-based dermatologist and Rowe's former boss, multiple sources confirm to the new issue of Us Weekly.

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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 favor (and would not confirm that the marriage was ever consummated).

"I said, 'Let me do this. You need to be a dad. You have been so good to me,'" Rowe -- who met Jackson when she was a nurse's assistant in the 1980s -- has said.