The aircraft en route to Cabo San Lucas, Mexico, for the 'Friends' alum's 50th birthday bash is reportedly circling for hours before making a safe landing at the Ontario International Airport.

• Feb 16, 2019

AceShowbiz - Are they okay? Jennifer Aniston and Courteney Cox had a flight scare on Friday, February 15. The two stars' vacation was interrupted as the private jet that they were on made an emergency landing. The plane, which was en route to Cabo San Lucas, Mexico, circled back and landed at the Ontario International Airport in Ontario, California.

According to TMZ, the flight took off from LAX at 11 P.M. to head to Cabo San Lucas, where the "Friends" alum will throw her 50th birthday party with her pals. The bash seemingly had to get delayed when the plane lost a wheel or a tire during takeoff.

Prior to landing, the plane allegedly were circling for hours to burn off fuel for a safe landing. It touched down at 2 P.M. Fortunately, Aniston, Cox and the other passengers aboard including Molly Kimmel were unharmed and are allegedly still waiting for a new plane at the airport to take them to Cabo San Lucas.

ONT Airport previous tweeted a warning for "an incoming aircraft," writing, "ALERT: ONT and the City of Ontario Police and Fire Departments are currently on alert for an incoming aircraft. More information to follow." The tweet was later followed with a final update which read, "Incoming aircraft, Gulfstream - N729TY, landed safely at ONT. OPD and OFD are on the scene."

The airport then released an official statement of the emergency landing, revealing that they faced issues with the plane's landing gear. "A Gulfstream aircraft with 10 passengers and two flight crew members on board landed without incident at Ontario International Airport (ONT) after experiencing landing gear difficulty," the statement read.

"The plane was en route Friday from Los Angeles International Airport to Cabo San Lucas when it was discovered that one of the four rear tired had displaced," it added. "The aircraft landed safely at ONT around 2 P.M. Friday."

Rumor has it that Brad Pitt was among the passangers, but TMZ claims that that's not true. A source tells the news outlet that the passengers are all women. Among them is Amanda Anka, Jason Bateman's wife. Another source previously said of Jen's upcoming birthday bash, "The party was a celebration of Jen's life."