Prince To The Rescue: Paris Jackson's Brother Steps In To Save Troubled Star

Days after she allegedly attempted suicide, Paris Jackson is in crisis — and her big brother Prince is coming to her rescue, RadarOnline.com can exclusively report.

The late Michael Jackson's oldest and perhaps most grounded child, 22, is so worried about his sister, he's stepping in to help with her recovery, a source told RadarOnline.com.

"He wants to act almost like a father figure to Paris right now," the source explained, adding that he's taking a tough-love approach.

"He told her that her behavior is not going to fly anymore."

As RadarOnline.com previously reported, Paris, 20, boozed and fought with her boyfriend Gabriel Glenn during a wild weekend of partying in New Orleans for Mardi Gras. She had just checked out of rehab.

Days later, on Saturday, March 16, cops told RadarOnline.com they responded to a call for a suicide attempt at Paris' Los Angeles home.

She vehemently denied anything serious had occurred, and was spotted at the movies with Gabriel later that day.

As RadarOnline.com previously reported, ailing matriarch Katherine, 88, doesn't have the energy to help save her troubled granddaughter, and is giving up hope she can be saved.

"It is a dangerous situation," a family source said.