Michael Jackson's is not the biological father of any of his three children, it's claimed.

The late star's ex-wife Deborah Rowe is also not the biological mother of Prince Michael Junior, 12 and Paris Michael Katherine, 11, reports TMZ.

His third child, seven-year-old Prince Michael II, was born to an unknown surrogate mother.

TMZ said that multiple sources have claimed Michael was not the sperm donor for any of his children, while Debbie was merely the surrogate for Prince Michael and Paris.

Prince Michael II's birth mother was not told that her baby would be going to one of the world's biggest stars, the website claims.

Instead, the singer's lawyer apparently collected the baby three days after its birth from Grossmont Hospital in San Diego County and delivered it to him.

Meanwhile, the site also claims that, as well not being the biological father of his children, Michael neglected to legally adopt them because he didn't anticipate anyone launching a custody challenge.

Despite this, legal experts reportedly say that Michael would be 'presumed' to be the father.

The claims come just 24-hours after his mother, Katherine, was awarded temporary custody of her son's three children following his death last Thursday.