  Rare lepton decays of the B(s), D and K mesons are sensitive probes of New
Physics. In particular, the search for the decays $B^0_(s) -> \mu^+ \mu^-$
provides information on the presence of new (pseudo-)scalar particles. LHCb is
well suited for these analyses due to its large acceptance and trigger
efficiency, as well as its excellent invariant mass resolution and lepton
identification capabilities. The status of these analyses with $\sim1$
fb$^{-1}$ of pp collisions collected by LHCb in 2011 at $\sqrt{s}=7$ TeV is
reviewed.
