  We discuss H and K observations of three fields in the bulge and disk of M31
obtained with the Altair adaptive optics system and NIRI instrument on Gemini
North. These are the highest resolution and deepest near-infrared observations
obtained to date of the inner regions of M31, and demonstrate the promise of
ground-based adaptive optics for studying the crowded regions of nearby
galaxies. We have combined our observations with previously published
HST/NICMOS observations of nine M31 fields and have derived the coarse star
formation histories of M31's bulge and inner disk. From fits to the M_K
luminosity functions, we find the stellar population mix to be dominated by
old, nearly solar-metallicity stars. The old populations, which we define as
having age >~6 Gyr, indeed dominate the star formation histories at all radii
independent of the relative contributions of bulge and disk stars. Although all
of our fields contain some bulge contribution, our results suggest that there
is no age difference between the bulge and disk to the limit of our precision.
