It may be "old" in the sense it wasn't made recently (1977 is correct) but it is a timeless classic. I can't tell you how many times I have seen or run it, and I still enjoy it 35 years after the first time I saw it.
It was released in 1977 by George Lucas. This movie is good just like any other and whether old or not, about 34 years old now, it still can be watched by many. One can watch this movie again and learn much more and catch on some bits that were missed or forgotten the first time.