A Colorado middle school has apologized for not warning parents that a drag queen would be among the invited guests to speak to students as part of a career day.

The drag queen named Jessica L'Whor was among those who spoke to 12-year-olds at a career and literacy event at Rocky Top Middle School in Denver last Friday.

Introducing herself as Ms Jessica, the dancer and performer spoke to the students about her career and bullying.

She read part of a children's book called 'Horrible Harry', which is focused on bullying, and then spoke about the damage it can do to people.

The drag queen named Jessica L'Whor was among those who spoke to 12-year-olds at a career and literacy event at Rocky Top Middle School in Denver last Friday

Ms Jessica said she believed the message resonated with students.

'I had a couple kids that were like, 'I'm gay in school and I get bullied every week and I don't know what to do and just talking to you helped me realize that I can still be me and still be happy,'' she told local news outlet KDVR.

'I got messages being like, 'Thank you so much for coming to my class. I was having a really horrible week and you made my day'.'

Ms Jessica was invited to speak at the career event by a student who is one of her relatives.

Following the outrage from some parents, the school said it was not apologizing for allowing Ms Jessica to speak.

They did, however, apologize for not warning parents that Ms Jessica would be speaking to the children.

Ms Jessica was invited to speak at the career event by a student who is one of her relatives. She is pictured above in the middle school hallway during the event

Introducing herself only as Ms Jessica, the dancer and performer spoke to the students about her career and the impacts of bullying

Principal Chelsea Behanna sent a letter home to parents saying a handful of parents had expressed concern over Ms Jessica's presence at the event.

'Jessica, the drag queen, began her guest session with an explanation of her career -as did all other guests. She explained that she is a performer who, though a man, portrays a woman for her performances,' Behanna said.

'Jessica then read a great chapter from Horrible Harry in Room 2B by Suzy Kline. She used the text to illustrate the damage bullies can do, the need to always put kindness and acceptance at the forefront, and the shortsightedness of judging a book by its cover.

'Students were completely engaged and asked lots of great questions.'

Behanna said she took responsibility for not notifying families ahead of time and apologized for any stress it had caused.

'Moving forward, a prominent step in planning for next year will be to share the guest list for all families prior to the event.

'Should you feel like any of the sessions are not appropriate for your child, you'll be welcome to notify us and we'll make alternate arrangements for your child during that time.'

Ms Jessica (pictured left and right) read part of a children's book called 'Horrible Harry', which is focused on bullying, and then spoke about the damage it can do to people