I study the effect of role models on Maths aspirations and performance, and how the effect differs for same gender and same ethnicity role models relative to "non-relatable" role models. To investigate this question, I run a randomised controlled trial in English primary schools. Treatment schools are randomly assigned to one version of a TED-like video featuring a STEM professional. The content of all versions of the video is very similar, but gender and ethnicity of the speaker vary across different versions. I compare Maths aspirations and test scores in end of primary school standardised exams of pupils who receive a same gender or same ethnicity role model to pupils who receive a speaker of different gender and ethnicity, and to pupils in the control group. This allows to trace out the effect of role models on aspirations and performance, and further the difference in impact of same gender and same ethnicity role models relative to role models of different gender and ethnicity.