She was one of the original "Zigfeild Girls", back in the 1910s. She could sing, dance, and act. But, it was her talants as a commedian which we remember most today.
Her most famous role was that of "Baby Snooks" (in which Fanny portraid a toddler, to a tee!).
Later generations were reminded of Fanny Brice, thanks to the 1969 biopic about her life. Fanny was played by Barbera Striesand.