  Motivated by the first experimental evidence of meson oscillations in the D
system, we study D^0 - \bar D^0 mixing in the Littlest Higgs model with
T-parity, we investigate its role in constraining the model parameters and its
impact on the most interesting flavour observables. We find that the
experimental data are potentially strongly constraining but at present limited
by large theoretical uncertainties in the long-distance Standard Model
contribution to D^0 - \bar D^0 mixing.
