The simultaneous investigation of the pion electromagnetic form factor in thespace- and time-like regions within a light-front model allows one to addressthe issue of non-valence components of the pion and photon wave functions. Ourrelativistic approach is based on a microscopic vector meson dominance (VMD)model for the dressed vertex where a photon decays in a quark-antiquark pair,and on a simple parametrization for the emission or absorption of a pion by aquark. The results show an excellent agreement in the space like region up to-10 $(GeV/c)^2$, while in time-like region the model produces reasonableresults up to 10 $(GeV/c)^2$.
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