WHAT hap­pened to MICKEY ROONEY's money?

With hundreds of big and small screen appearances dur­ing a legendary career that spanned nearly nine dec-ades, the pint-size actor should have left a multi­million-dollar fortune to his heirs.

But after recent revela­tions that Rooney had just $18,000 to his name when he died on April 6 at the age of 93, his eight biologi­cal children are banding together to find out where the money went.

What’s more, they’re crying foul that they were completely cut out of the latest version of the actor’s will, executed on March 11 in Alhambra, Calif., which left everything to Rooney’s stepson, Mark Aber. (Mark also goes by the last name “Rooney.”)

And it’s not only Rooney’s kids who are contesting the new will: Mark’s mom – Rooney’s eighth wife, Jan – and her other son, Chris, have a copy of a living trust from 2003, which they believe spells out how Rooney REALLY wanted his money split.

Rooney and Jan married in 1978, but separated in 2012.

“You have to won­der what happened to Mickey’s money,” said a family insider. “It’s hard to believe he had so little. You know the family will be demand­ing an accounting.

“They’ve hired a legal team to look for loopholes.”

In an exclusive interview, Theodore “Ted” Rooney, the actor’s son with third wife Martha Vickers, told The ENQUIRER: “The Abers are disgusting. We found out that my father died when we heard it on the news. The Abers never bothered to tell us!”

And in fact, Rooney seemed terrified of Chris, seeking, in 2011, a restraining order against him. He then sued Chris and his wife, Christina, for elder abuse. Last year, a $2.8 million settlement was negotiated with Chris and Christina in Mickey’s favor.

“My dad was very trusting and he truly loved Jan and her kids, Chris and Mark,” Ted explained. “But in his fi­nal years, he was frail and not as mentally alert. I think the Abers took advantage of that.

“We have no idea how much my father earned in his final years. After he separated from Jan, he went to live with Mark, and it seems to us that Mark must have dealt with my father’s earnings in some capacity. We will be seeking a com­plete accounting from the Abers regarding where that money went.”

Attorney Raoul L. Felder, who reviewed Rooney’s liv­ing trust from 2003 as well as the March 11 will, says the updated version “looks perfectly normal” and sees nothing that would cause it to be declared invalid.

Meanwhile, Ted admits he last saw his father at Christmas in 1998, but says they spoke on the phone “whenever possible.”

“He has always been too wrapped up in his work or busy playing the horses at the track to be a great dad, but he was a sweet, loving man,” said Ted. “He may have left millions or nothing, but we have no intention of allowing the Abers to take advantage of his life’s work now that he has died.”