Although we don't actually see Pluto, it makes an appearance in a big way. Fans of the series are all too familiar with Gus's thoughts about Pluto being a planet (according to him, it is and always will be one) and how one of his most used pickup lines is, "Did you hear about Pluto? That's messed up, right?" Towards the end of the movie, as part of Selene's proposal to Gus, she asks him, "Burton Guster, will you make me the happiest woman on this planet? On Earth . . . and Pluto?" To which he replies, "And Pluto?!" It's absolutely fitting his perfect proposal includes a mention of his favourite (dwarf) planet.