Nathaniel Rateliff & the Night Sweats made their national TV debut on The Tonight Show earlier this week.

Jimmy Fallon talked about them throughout the entire episode and may officially be their #1 fan now.

Here, in case you missed it:

http://www.nbc.com/the-tonight-show/video/nathaniel-rateliff-the-night-sweats-sob/2888764

RIYL: good music, great music, Van Morrison, The Last Waltz