Tonight, former Grateful Dead keyboardist and singer-songwriter Bruce Hornsby will sit in with The Roots on The Tonight Show Starring Jimmy Fallon.

Hornsby is readying for another tour with Ricky Skaggs and Kentucky Thunder which kicks off June 21 in Black Mountain, NC and features a variety of solo Hornsby shows as well as gigs with Skaggs.

The Tonight Show airs at 11:35 PM on NBC.