One of Australia's elite private schools has issued a formal public apology to a 17-year-old student who was sexually abused by his teacher, 36.

Sydney Grammar School posted the groveling apology in Sydney newspapers on Saturday.

Married English and drama tutor Bronwen Williams had sex with the student, who cannot be named, in spare classrooms, storage rooms and at her apartment over three months in 2016.

During one encounter, the pair ate ice cream on her couch and watched Who Framed Roger Rabbit? before having sex.

Sydney Grammar School posted an apology after a 17-year-old male student was sexually abused by a 36-year-old female teacher in 2016

Married English and drama tutor Bronwen Williams had sex with the student, who cannot be named, in spare classrooms, storage rooms and at her apartment over three months in 2016

In text messages, she told the student that she was a 'f***ing monster' for her actions.

The victim felt 'harassed, stalked and dominated' by Williams.

In the apology letter, The $36,000-per-year school commended the student for reporting the sexual abuse at the end of 2016.

'The school is proud of the brave example he set in reporting the sexual abuse, preventing there being further victims, and it encourages all victims of abuse to report it,' the letter read.

'The school acknowledges this took enormous bravery on his part, and respectfully records its admiration of his courage in coming forward.'

Williams pleaded guilty of five counts of sexual intercourse with a person in her care in February 2018 and was sentenced to at least seven months.

She has since served her time.

Sydney Grammar went on to recognise that the abuse of male students at the hands of female teachers is just as serious.

'It is regrettable that this was not acknowledged in some of the reporting of this case.'

The teacher had been warned four times about inappropriate behaviour with students at the school

Daily Mail Australia previously revealed the teacher had been warned four times about inappropriate behaviour with students at the school.

She first met with the school in September 2013 - more than two years before she had sex with the boy - to be reminded of the school's child protection policy.

She was sent a letter by the school setting out the policy in detail the next day.

The next month, the teacher again met with the school following a complaint about her inappropriate behaviour towards students and was warned about a 'pattern' relating to her actions.

At the end of 2014 the teacher was reprimanded by the school for forming an 'overly close pastoral role' with a male student with a mental health problem.