  We report the fifth confirmed Luminous Blue Variable/S Doradus variable in
M31. In 2006, J004526.62+415006.3 had the spectrum of hot Fe II emission line
star with strong P Cygni profiles in the Balmer lines. In 2010, its absorption
line spectrum resembled an early A-type supergiant with H and Fe II emission
lines with strong P Cygni profiles, and in 2013 the spectrum had fully
transitioned to an F-type supergiant due to the formation of the optically
thick, cool wind which characterizes LBVs at maximum light. The photometric
record supports the LBV/S Dor nature of the variability. Its bolometric
luminosity ~ -9.65 mag places it on the HR Diagram near the known LBVs, AE And,
Var C in M33 and S Dor.
