  Azimuthally anisotropic distributions of D$^0$, D$^+$ and D$^{*+}$ mesons
were studied in the central rapidity region ($|y|<0.8$) in Pb-Pb collisions at
a centre-of-mass energy $\sqrt{s_{\rm NN}} = 2.76$ TeV per nucleon-nucleon
collision, with the ALICE detector at the LHC. The second Fourier coefficient
$v_2$ (commonly denoted elliptic flow) was measured in the centrality class
30-50% as a function of the D meson transverse momentum $p_{\rm T}$, in the
range 2-16 GeV/$c$. The measured $v_2$ of D mesons is comparable in magnitude
to that of light-flavour hadrons. It is positive in the range $2 < p_{\rm T} <
6$ GeV/$c$ with $5.7\sigma$ significance, based on the combination of
statistical and systematic uncertainties.
