Supermodel Naomi Campbell has been charged with second degree assault in New York after allegedly hitting her assistant, police said.
Naomi Campbell was in police custody since the alleged attack
A New York Police Department spokesman told BBC News the assistant had needed four stitches to her head after being hit by a mobile phone following a row.
Ms Campbell is expected to appear at Manhattan Criminal Court later on Thursday US time.
Her publicist said the model had fired her assistant before the alleged fight.
The publicist, based in New York, said: "We believe this to be a case of retaliation, because Naomi had fired her housekeeper earlier this morning. We are confident the courts will see it the same way."
Detective Bernard Gifford said he did not know what the argument was about.
He said Ms Campbell would be charged with a felony and would later go before a judge.
Ms Campbell shot to fame after being discovered in London at the age of 15.