  In this paper we analyse and discuss the HR Diagram position of two
extra-solar planet-host stars - HD37124 and HD46375 - by means of theoretical
stellar evolution models. This work was triggered by the results obtained by
Laws et al. (2003) who found that these stars were in contradiction to the
expectation based on their high metallicity. Fixing the age of both stars with
the value based on their chromospheric activity levels and computing our own
evolutionary models using the CESAM code, we are able to reproduce the observed
luminosity, effective temperature and metallicity of both stars for a set of
stellar parameters that are astrophysically reliable even if it is non-trivial
to interpret the absolute values for these parameters. Our results are
discussed in the context of the stellar properties of low mass stars.
