Whitney Houston had a monster hit with "I Will Always Love You," but who wrote and first released the song?

...a song written and originally recorded in 1973 by American singer-songwriter Dolly Parton. Written as a farewell to her business partner and mentor Porter Wagoner, expressing Parton's decision to pursue a solo career, the country single was released in 1974. The song was a commercial success for Parton, twice reaching the top spot of the US Billboard Hot Country Songs chart: first in June 1974, then again in October 1982, with a re-recording for "The Best Little Whorehouse in Texas" soundtrack.