Jamie-Lee O'Donnell is a Northern Irish actress from Derry. She is best known for her role as Michelle Mallon in the Channel 4 sitcom Derry Girls. O'Donnell was born to a large family in Derry, Northern Ireland. She attended St Anne's Primary School, St Cecilia's College, and North West Regional College. She began acting at a young age in school plays. Upon graduation, she decided to pursue it professionally despite not being able to afford drama school. She instead studied performing arts at De Montfort University in Bedfordshire. She began auditioning and dividing her time between England and home, taking part in theatrical productions and working as a dancer for promotions and pantomimes.