In America (2002)
During the Haloween party, a kid can be seen dressed as the Tin Man from The Wizard of Oz.
We briefly see a kid dressed as Darth Vader from STAR WARS
In addition to showing footage from E.T., the film also references the film in its dialogue and features an E.T. plush doll.
We briefly see a kid dressed as Robocop
father and son dances together (but in a studio)
Listed as one of the movies Jim Sheridan directed
Clip of movie is shown on TV screen in their apartment
the movie is shown in a TV, the title is confirmed in the final credits
They see the movie in the theater