UNCUT: Will Arnett Cracks Up With Stephen Over "SmartLess," Epic LEGO Builds, Paul McCartney & More

In this extended and hilarious interview, Will Arnett and Stephen talk about their worst auditions, the time Will was dressed as Batman backstage at the Academy Awards, and how he got Paul McCartney to go on his podcast, "SmartLess," and the joys of blowing up epic LEGO builds on "LEGO Masters." #Colbert #WillArnett #SmartLess Subscribe To "The Late Show" Channel: http://bit.ly/ColbertYouTube Watch full episodes of "The Late Show": http://bit.ly/1Puei40 Like "The Late Show" on Facebook: http://on.fb.me/1df139Y Follow "The Late Show" on Twitter: http://bit.ly/1dMzZzG Follow "The Late Show" on Instagram: http://bit.ly/29wfREj Watch The Late Show with Stephen Colbert weeknights at 11:35 PM ET/10:35 PM CT. Only on CBS. --- The Late Show with Stephen Colbert is the premier late night talk show on CBS, airing at 11:35pm EST, streaming online via Paramount+, and delivered to the International Space Station on a USB drive taped to a weather balloon. Every night, viewers can expect: Comedy, humor, funny moments, witty interviews, celebrities, famous people, movie stars, bits, humorous celebrities doing bits, funny celebs, big group photos of every star from Hollywood, even the reclusive ones, plus also jokes.