Most of us remember Ken Curtis as Festus on the long-running "Gunsmoke" TV series. But prior to that he played many similar roles in memorable John Wayne movies ("Rio Grande," "The Searchers," etc.) and prior to that he joined the Tommy Dorsey big band group as a vocalist, taking Frank Sinatra's place when he left. He was married to John Ford's daughter.
Here he is singing "Tumbling Tumbleweeds."
(Click the Link)
https://m.youtube.com/watch?v=fWR6FLnPack