In this talk we will discuss boson star configurations in quantum field theory using the semiclassical gravity approximation. Restricting our attention to the static case, we show that the semiclassical Einstein- Klein-Gordon system for a single real quantum scalar field whose state describes the excitation of N identical particles, each one corresponding to a given energy level, can be reduced to the Einstein- Klein-Gordon system for N complex classical scalar fields. Particular consideration is given to the spherically symmetric static scenario, where energy levels are labeled by quantum numbers n, l and m. When all particles are accommodated in the ground state n = l = m = 0, one recovers the standard static boson star solutions. On the other hand, for the case where all particles have fixed radial and total angular momentum numbers n and l, but are homogeneously distributed with respect to their magnetic number m, one obtains the l-boson stars, whereas when l = m = 0 and n takes multiple values, the multi-state boson star solutions are obtained.Thus, we have shown that in semiclassical gravity, Boson Stars relatives arise naturally as the quantum fluctuations associated with the state of a single field describing a many-body system.