  We compute non-perturbative spectral functions in a scalar $\phi^4$-theory in
three spacetime dimensions via the spectral functional renormalisation group.
This approach allows for the direct, manifestly Lorentz covariant computation
of correlation functions in Minkowski spacetime, including a physical on-shell
renormalisation. We present numerical results for the spectral functions of the
two- and four-point correlation functions for different values of the coupling
parameter. These results agree very well with those obtained from another
functional real-time approach, the spectral Dyson-Schwinger equation.
