  We present the first modern analysis of two young, eclipsing binaries, EK Cep
and HS Her, based on new, ground-based, CCD multicolour light curves as well as
the TESS observations, radial velocity curves, and eclipse timing measurements.
The orbital and stellar parameters of the stars are determined by Roche
modelling, and their evolutionary status is examined using a grid of isochrones
and evolutionary tracks. We find that HS Her is 25-32 Myr old and its
components are on the zero-age main sequence; at the age of 16-20 Myr, the
primary of EK Cep is also on the ZAMS, but its secondary is a pre-main-sequence
star. Both binaries have slightly eccentric orbits and display apsidal motion.
Based on updated eclipse timings and spectroscopic evidence, we rule out the
presence of a previously hypothesized tertiary component in HS Her.
