  Low luminosity active galactic nuclei (LLAGN) probe accretion physics in the
low Eddington regime and can provide additional clues about galaxy evolution.
AGN variability is ubiquitous and thus provides a reliable tool for finding
AGN. We analyze the All-Sky Automated Survey for SuperNovae light curves of
1218 galaxies with $g<14$ mag and Sloan Digital Sky Survey spectra in search of
AGN. We find 37 objects that are both variable and have AGN-like structure
functions, which is about 3% of the sample. The majority of the variability
selected AGN are LLAGN with Eddington ratios ranging from $10^{-4}$ to
$10^{-2}$. We thus estimate the fraction of LLAGN in the population of galaxies
as 2% down to a median Eddington ratio of $2\times10^{-3}$. Combining the BPT
line ratio diagnostics and the broad-line AGN, up to $\sim$60% of the AGN
candidates are confirmed spectroscopically. The BPT diagnostics also classified
10-30% of the candidates as star forming galaxies rather than AGN.
