Unveiling Cloudy Exoplanets: from Hubble to JWST

It is fast becoming evident that cloud and haze are common features of exoplanet atmospheres, just as they are in the Solar System. Current data from the Hubble Space Telescope provide evidence for their presence, and some indications of their properties, but contain insufficient information to fully constrain cloud structure, particle size and composition. JWST will provide more detail about cloudy atmospheres provided signatures can be disentangled from those of star spots. I will discuss the present state of retrievals from cloudy exoplanet spectra and the level of improvement we can expect in the JWST era.