Kausalya, who survived the March 13 attack and is undergoing treatment for head injuries in a government hospital here, was taken to the court in an ambulance with tight security and produced before the Judicial Magistrate's Court in Palladam.
Appearing as a witness, Kausalya gave her statement under CrPC section 164 (recording of confessions and statements) about the incident before Magistrate G Krishnan.
A three-member gang had attacked the couple near a bus stand in Udumalpet allegedly at the behest of the woman's father, a caste Hindu who was opposed to their inter-caste marriage.
After the nearly two-and-half-hour witness' statement, Kausalya was taken back to the hospital in the evening, police said.
Police have so far arrested five persons in connection with the murder which sparked an outrage after shocking visuals of the attack went viral.
Kausalya's father had surrendered before a court and denied any role in the attack.