Corey Feldman has been rushed to hospital after suffering a medical emergency on a flight back to Los Angeles.
The 54-year-old actor, best known for his roles in The Goonies and Stand By Me, fell seriously ill during the journey from Chicago on Monday afternoon.
Paramedics were waiting at the gate when his plane touched down at LAX, and he was immediately transported by ambulance to a nearby medical facility.
The Los Angeles Fire Department confirmed they responded to the airport to assist a 54-year-old male passenger who needed urgent medical attention.
Corey Feldman was rushed to hospital once in LA
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A doctor who happened to be on board the flight examined Mr Feldman after he began feeling unwell mid-air.
Medical professionals believe the former child star may be dealing with pancreatitis or gallstones, though no official diagnosis has been confirmed yet.
Mr Feldman's publicist told USA Today that the actor is currently resting overnight at the hospital while awaiting the results of an MRI scan.
Pancreatitis involves inflammation of the pancreas, which can cause severe abdominal pain, nausea and vomiting - symptoms that often require immediate hospital care.
Corey Feldman shot to fame in The Goonies
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Gallstones, meanwhile, are hardened deposits that form in the gallbladder and can trigger similar painful symptoms.
The actor remains under observation as doctors carry out further tests to determine exactly what caused his sudden illness during the flight.
His representatives have not yet provided any updates on when he might be discharged.
Mr Feldman had been enjoying a busy weekend in the Midwest before the frightening incident.
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Corey Feldman was on the plane when the emergency occurred
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He'd joined his Stand By Me co-stars Jerry O'Connell and Wil Wheaton at The Chicago Theatre on Sunday night for a special 40th anniversary celebration of the beloved 1986 film.
The trio had also appeared together in Indianapolis on June 13, with Mr Feldman posting on Instagram that the "incredible turnouts" at both shows meant there was a strong chance they'd announce additional tour dates.
Before heading to Chicago, the actor made a poignant stop in Gary, Indiana, to visit the childhood home of his late friend Michael Jackson.
He shared photos and videos from the visit on social media, paying his respects to the legendary singer's family.
Speaking to People magazine earlier this year, Mr Feldman opened up about the emotional weight surrounding the anniversary tour.
"We have this instant connection and it's there. The camaraderie is there; the jokes are there. We have so much fun," he said of reuniting with his co-stars.
"But there's this looming thing hanging over us," he added, referring to the late River Phoenix and director Rob Reiner, who was killed alongside his wife Michele at their Los Angeles home in December 2025.
"The movie is called 'Stand By Me,' and there's four of us. We can't stand by River, because he's not here. Now with Rob missing too - I'm sorry, I'm going to get a little emotional - but I was so hoping that he would be able to join us for this."