The Steep Canyon Rangers have become widely known since collaborating with an American comedian who came to public notice as a writer for what?
Steep Canyon Rangers:  Though formed in 2000, the band has become widely known since 2009 for collaborating with actor/banjoist Steve Martin. Steve Martin:  Martin came to public notice in the 1960s as a writer for "The Smothers Brothers Comedy Hour", and later as a frequent guest on "The Tonight Show".
i don't know