  The PVLAS anomaly can be explained if there exist millicharged particles of
mass $\stackrel{<}{\sim} 0.1$ eV and electric charge $\epsilon \sim 10^{-6} e$.
We point out that such particles occur naturally in spontaneously broken mirror
models. We argue that this interpretation of the PVLAS anomaly is not in
conflict with astrophysical constraints due to the self interactions of the
millicharged particles which lead them to be trapped within stars. This
conclusion also holds for a generic paraphoton model.
