  We present initial results and source lists of variable sources in the Large
Magellanic Cloud (LMC) for which we detect thermal infrared variability from
the SAGE (Surveying the Agents of a Galaxy's Evolution) survey, which had 2
epochs of photometry separated by three months. The SAGE survey mapped a 7
degree by 7 degree region of the LMC using the IRAC and the MIPS instruments on
board Spitzer. Variable sources are identified using a combination of the IRAC
3.6, 4.5, 5.8, 8.0 \micron bands and the MIPS 24 \micron bands. An
error-weighted flux difference between the two epochs is used to assess the
variability. Of the ~ 3 million sources detected at both epochs we find ~ 2,000
variable sources for which we provide electronic catalogs. Most of the variable
sources can be classified as asymptotic giant branch (AGB) stars. A large
fraction (> 66%) of the extreme AGB stars are variable and only smaller
fractions of carbon-rich (6.1%) and oxygen-rich (2.0%) stars are detected as
variable. We also detect a population of variable young stellar object
candidates.
