Dolly Parton was a (silent) producer on Buffy the Vampire Slayer.

According to Today, “Parton founded Sandollar Entertainment with her friend and business partner, Sandy Gallin, in 1986. The production company is listed as the producer of Buffy the Vampire Slayer [on] IMDb. Sandollar Entertainment also worked on the original 1992 Buffy the Vampire Slayer movie.”
Also, fun fact, “Later, when Parton learned that (then-executive producer) Gail Berman had been given less royalties from Buffy the Vampire Slayer than her male counterparts, Parton invited her to lunch and handed her a check to make sure she was paid equally, Berman told The New York Times in 2016.”