AMC is televising two versions of this movie tonight. At 8:45 p.m. ET, it presents the 1994 remake, starring Richard Attenborough as the modern embodiment of Santa Claus, and Mara Wilson as the little girl who believes this particular department-store Santa is real. But the one to watch is the original, which starts at 6:30 p.m. ET. The 1947 holiday classic stars Edmund Gwenn as the Macy’s store Santa, and, as the young girl who believes in him, a very, very young Natalie Wood.