Students from a Toorak private school are the subject of a police probe after they filmed themselves driving through a McDonald's drive-thru and posted the video on social media platform TikTok.

In the video filmed in Prahran, the students from St Catherine's, one of Melbourne's top girls' schools, are not wearing seatbelts, and the giddy passengers gesticulate to the underage driver to brake as she pleads she "know[s] how to drive!".

The girls are wearing their school uniforms, and they unsuccessfully attempt to conceal the school's logo by placing emojis over them in the video, which has since been deleted.

On Monday, when the Herald Sun reported the existence of the video, St Catherine's said it would not take action against the students because the incident occurred outside school hours and the girls were accompanied by a guardian.