First recorded by Keith Whitley (C&W #1 1988).
Other hit versions by Alison Krauss & Union Station (US #53/C&W #3/CAN #7 1995), Ronan Keating (UK #1/IRE #1/AUS #3/NZ #1/ 1999), Deborah Blando & Roan Keating (as “O Amor Fala por Nós”) (2002).
From the wiki: “‘When You Say Nothing at All’ was written by Paul Overstreet and Don Schlitz (‘The Gambler‘), and is among the best-known hit songs for three different performers: Keith Whitley, who took it to the top of the Billboard Hot Country Singles chart in 1988; Alison Krauss, whose version became her first solo Top 10 Country hit in 1995; and Irish pop singer Ronan Keating, whose version was his first solo single and a chart-topper in the United Kingdom in 1999.