According to The Sun, King is said to have attacked the 20-year-old student when she shunned his advances.
Married father-of-two King, 28, was originally arrested in Dec.
He answered bail at London's Charing Cross police station yesterday and was charged with assault occasioning actual bodily harm and sexual assault by touching.
King, who is on loan at Middlesbrough, is due to appear before City of Westminster magistrates on Feb 25.
The ABH charge carries a maximum of five years' jail.&13;&13;