Galactic Senate scene

In the Galactic Senate scene, when Queen Amidala is asking for a vote of no confidence, and the whole Senate is on their feet shouting, in the lower-left corner you can see that there are E.T. species (as in movie E.T. the Extra-Terrestrial (1982)). George Lucas included them as a tribute to his long-time friend, Steven Spielberg, as well as showing them existing in the same universe.