Hiranya Peiris is professor of astrophysics at University College London and director of the Oskar Klein Centre for Cosmoparticle Physics in Stockholm. Her research aims to test fundamental physics using large cosmological datasets, including the cosmic microwave background and galaxy surveys, using an interdisciplinary approach combining observations, theoretical physics, and advanced statistical methods. She completed her undergraduate studies at Cambridge University in 1998 and got her Ph.D. from Princeton University in 2003. She was a Hubble Fellow at the University of Chicago in 2004-2007. She then moved back to Cambridge as a Halliday Fellow at the Science & Technology Facilities Council. She began a faculty position at University College London in 2009. In 2016 she was elected fellow of the American Physical Society and vice president of the Royal Astronomical Society.