The week of August 19-23, 2019, the Niels Bohr Institute and the Discovery Center jointly hosted its annual workshop on current themes in high energy physics and cosmology. The idea was to provide a stimulating environment with few talks per day, but plenty of time for informal discussions. A broad range of topics will be addressed. This year's focus is on physics and astrophysics in the era of gravitational wave detection. Invited speakers included Vitor Cardoso from CENTRA.