proving that galois representations in many situations arise from automorphic forms has been a major theme in number theory for at least two decades. however, most of the existing work concerns the situation when the mod p reduction of the galois representation (i.e., the residual representation) is irreducible and when the number field is totally real. we will present new modularity results for n-dimensional residually reducible galois representations over arbitrary number fields. this is joint work with t. berger.