mike birbiglia. musical guest a$ap mob.nd featuring the legendary roots crew. >> questlove: 504, new orleans. >> steve: and now, here he is, jimmy fallon! ♪ ♪ [ cheers and applause ] >> jimmy: oh, please, please. welcome, welcome! oh, that's what i'm talking about. that's the energy we want. that is a great new york city crowd right there. going nuts. i love you. [ cheers and applause ] thank you. love right back to you guys. thank you so much. i appreciate it. thank you, buddy. thank you very much. [ cheers ] welcome to the "tonight show," everybody. here's what everyone's talking about. of course it's the republican convention. there's quiet right there. [ laughter ] made them stopped clapping. the republican convention. i saw today donald trump returned to cleveland ahead of tomorrow night's speech. and a lot people noted that trump was greeted by his whole family when he landed except for his wife melania. [ audience oohs ] even weirder, michelle obama was there. >> steve: really? [ laughter ] >> jimmy: i don't know --

while birbiglia wrote the comedy "don't think twice.">> he said to me once with, you should play jack. it's the best part! you've got to play that part! and i was, like, i'm not talented enough to play jack. like, the guy who plays jack has to be so overwhelmingly talented that you're, like, that guy should get whatever he wants. >> we want to know, has anybody out here had a particularly hard day? >> something actually hard like not like your roommate ate your yogurt. >> reporter: instead, he took the smaller role of miles who was left behind when jack makes it big. >> i would say has anybody had a particularly hard day or a hard week or a hard month or hard year. because i want to work from the place of pain and figure out if, in real-time, we can turn that into comedy. i actually think of myself as a sex maybe. just to say if i see a girl, do you think i am obsessed with them? maybe. i'm not ashamed of that. there were period in my life where i was a sex never. >> reporter: he almost never made it to this point. >> i have a sleep diso

mike birbiglia. >> seth: birbiglia, who wrote and directed it. >> mm-hmm. >> seth: but, you know, part out. >> exactly, right, right. they never tell you. they just kind of look at you like, good for you. [ light laughter ] but when i auditioned -- the time that i auditioned for "mad tv", the guys had come in, and what happened was all i had heard was that they were looking for three women to replace. they were only going to replace three women. and i was just like, "well, i don't have a vagina, so i'm good to go." >> seth: yeah. >> you know, i just figured i was fine. so, you know, because the hardest thing is when you hear a producer is there. >> seth: yeah. >> and then all the tenants of improv, you're trying to keep them intact, which is care about the fellow player. you're doing a good job if you make them look good, team work, collaboration, but you really want to go -- i'm here! [ laughter ] hire me! and so it's really, really difficult to -- you start to become ambivalent, you know? >> seth: yeah. >> but that night for me, i thought, "oh, they're not looking at me. they're not

mike birbiglia.

now stick around for james corden and his guests, tatiana maslany and mike birbiglia. good night!ready to have some fun ♪ feel the love tonight don't you worry 'bout ♪ your hang-ups and fears 'bout to set you right ♪ it's the late, late show