A 41-year-old niece of fashion icon Ralph Lauren is to be sentenced tomorrow in relation to an air rage incident that occurred yesterday.

Jenny Lauren appeared at a district court sitting today for her case after spending the night at Shannon Garda Station.

Her solicitor, Sharon Curley, confirmed to Killaloe District Court, held in the Brian Boru pub in Ballina, that Ms Lauren would be pleading guilty to three charges.

The charges relate to an incident on board a Delta Airlines flight from Barcelona to JFK in New York.

Judge Patrick Durcan said it would not be appropriate for the case to be dealt with at Killaloe and it should be heard in Ennis tomorrow.

He told Ms Curley that before he would impose sentence, the nature and extent of how people were discommoded, the cost to the airline and the cost to Shannon Airport arising from the incident would have to be addressed.

Judge Durcan said: "I am talking about the totality of the costs involved. These are the issues that must be addressed before the matter is finalised."

Ms Curley said that there would be an application for bail and Judge Durcan asked that Ms Lauren confirm her nationality and that she does not hold dual citizenship.

Ms Lauren gave brief sworn evidence to confirm that she was American and did not hold any other passport.

Ms Curley proposed an €800 cash lodgement as part of bail conditions and Judge Durcan rejected that amount and said that €2,500 would be the appropriate amount.

Inspector Tom Kennedy said that gardaí have Ms Lauren's passport and they would be insisting on signing-on conditions and for a specified address for Ms Lauren before tomorrow's court appearance.

Judge Durcan adjourned the case to allow Ms Lauren meet the terms of her bail.

Ms Lauren is charged with engaging in behaviour of a threatening, abusive or insulting nature whether by word or gesture with intent to cause a breach of the peace, or being reckless as to whether a breach of the peace might have been occasioned on 6 January on board the Delta Airlines flight.

Ms Lauren is also charged with being intoxicated to such an extent as would give rise to a reasonable apprehension that you might endanger yourself or other persons on board on the same date on the same flight.

Ms Lauren is also charged with, without justification engaging in behaviour likely to cause serious offence or annoyance to any person on board the aircraft, having been requested by a member of the aircraft to cease such behaviour on 6 January.

Garda Evette Walsh said that Ms Lauren made no reply when charged and cautioned.

The captain of the Delta Air Lines flight, with 209 passengers and crew on board, diverted to Shannon Airport at 1.05pm yesterday as a result of the alleged incident.

Ms Lauren was arrested by gardaí in Shannon after touching down at the airport at 1.47pm.

She was then brought by gardaí for questioning to Shannon Garda Station, where she also met with a representative of the US embassy in Ireland.

Gardaí also took six witness statements from the captain of the flight and five other Delta flight crew as part of the investigation into the incident.

The Delta Airlines flight remained on the tarmac for over two hours yesterday at Shannon and continued its journey to JFK in New York at 4.15pm.

Ms Lauren operates a high-end jewellery business in the US called Jenny Lauren Jewellery.

Her 2004 memoir, Homesick: A Memoir of Family, Food and Finding Hope, recounted her battle with an eating disorder in her teens and 20s.

Last year, Forbes magazine gave Ms Lauren's famous uncle, 74- year-old Ralph Lauren, a net worth of $7.7bn as a result of his worldwide clothing empire.

The Bronx native started off his business in the 1960s selling neckties in Manhattan.

In fiscal 2013, the Ralph Lauren corporation reported revenues of $6.9bn in what Mr Ralph Lauren described as "record sales and profit levels".