  In this letter we present the first multiparticle solutions to Einstein's
field equations in the presence of matter. These solutions are iteratively
obtained via the perturbiner method, which can circumvent gravity's infinite
number of vertices with the definition of a multiparticle expansion for the
inverse spacetime metric as well. Our construction provides a simple layout for
the computation of tree level field theory amplitudes in $D$ spacetime
dimensions involving any number of gravitons and matter fields, with or without
supersymmetry.
