A Spanish judge has summoned the youngest daughter of King Juan Carlos to appear in court over accusations of fraud and money-laundering.
The Infanta Cristina, 48, has been linked to the business affairs of her husband, Inaki Urdangarin, who is being investigated for alleged embezzlement.
The princess is now a formal suspect and should appear in court on 8 March.
It is believed to be the first time a direct relative of the king will appear in court accused of wrongdoing.
Palma de Mallorca court judge Jose Castro ordered the princess to appear for questioning about her partnership with Mr Urdangarin in a firm called Aizoon.
Last year, properties belonging to her husband were impounded after allegations that Mr Urdangarin, the Duke of Palma, misused millions of euros in public funds given to a charitable foundation he ran.
The duke denied wrongdoing and was not charged with any crime.
One of the properties impounded is a large luxury house on the outskirts of Barcelona belonging to the duke and Princess Cristina.
The Infanta Cristina is the king’s middle child. She has an elder sister, Infanta Elena, and a younger brother, Crown Prince Felipe, the heir apparent.
‘Maximum respect’
Responding to Tuesday’s announcement, the royal household said it had “maximum respect for judicial decisions
News that the princess is now a formal suspect comes amid a decline in popularity for the Spanish king, 76, whose image was dented by a luxury elephant-hunting trip he made to Africa in 2012.
On Monday, he presided over a military parade on crutches at Madrid’s royal palace, having recently undergone hip replacement surgery.
An opinion poll published on Sunday suggested that 62% of Spaniards wanted him to abdicate and fewer than half supported the monarchy in general.
However, the same Sigma Dos poll for El Mundo newspaper also indicated that a majority supported Crown Prince Felipe and believed he could restore the family’s prestige.
Juan Carlos became king in 1975, when he oversaw the country’s transition from dictatorship under the late Gen Francisco Franco to democracy.