Name	Known for
David Letterman Self - Host Self - Host See fewer	Late Show with David Letterman (1993)
Paul Shaffer Self - Musical Director Self - Musical Director See fewer	This Is Spinal Tap (1984)
Gary Clark Jr. Self - Musical Guest Self - Musical Guest See fewer	Deepwater Horizon (2016)
Alyson Hannigan Self - Guest Self - Guest See fewer	Buffy the Vampire Slayer (1997)
Neil Patrick Harris Self - Guest Self - Guest See fewer	How I Met Your Mother (2005)
Amber Heard Self - Guest Self - Guest See fewer	Aquaman (2018)
Alan Kalter Self - Announcer (voice) Self - Announcer (voice) See fewer	Commander USA's Groovie Movies (1985)
Josh Radnor Self - Guest Self - Guest See fewer	Liberal Arts (2012)
Jason Segel Self - Guest Self - Guest See fewer	Forgetting Sarah Marshall (2008)
Aaron Serotsky Teddy Roosevelt Teddy Roosevelt See fewer	Dopesick (2021)
Cobie Smulders Self Self See fewer	The Avengers (2012)
Kevin Spacey Self - Guest Self - Guest See fewer	L.A. Confidential (1997)
Johnny Radelat Musicians (uncredited) Musicians (uncredited) See fewer	32nd Film Independent Spirit Awards (2017)