Eternal Sunshine of the Spotless Mind was produced by This is That corporation. Founded by Ted Hope, Diana Victor, and Anne Carey, This is That Productions has been big in the indie scene since the early 2000s. Eternal Sunshine fits right in with all of the other happy, upbeat movies they've produced—you know, movies like 21 Grams (about a tragic car accident) or The Savages (about the dementia and death of a father).
Anthony Bregman was one producer for the film. Have you ever wondered what exactly a producer does on a film? Well, wonder no more; let Bregman himself explain the profession to you in all its glory. Bregman is known for movies like The Ice Storm and as well as more recent movies, like Foxcatcher, which you totally won't recognize Steve Carell in.
We've also got producer Steve Grolin in the mix to spice things up. His production company, Anonymous Content, has produced a number of thing the names of which we can't disclose. Okay, they're not actually that anonymous; in fact, Grolin's worked with a number of big-time directors like David Fincher and Spike Jonze, and he was even nominated for an Academy Award for producing Alejandro González Iñárritu's Babel.