tomorrow night, from the program "castle", nathan fillion, the latest castoff from "dancing with the from calle 13. and then later this week, chris o'donnell, ginnifer goodwin, windell middlebrooks, kate hudson, and music from zac brown band and raphael saadiq. so please join us. our first guest tonight is a talented and charming man and a former packed brat. you can see him every week on "parks and recreation" and read all about his unbelievable life in the new book "stories i only tell my friends," please say hello to rob lowe. [ cheers and applause ] >> jimmy: welcome. hey, congratulations. they just said your book's number three on "the new york times" best-seller list. >> how about that? >> jimmy: that's pretty good. >> unbelievable. >> jimmy: do you ever -- did you worry, what if i write this and nobody's interested in reading it? >> every day i was writing it. >> jimmy: so you thought, i have to put all the good stories in here. >> writing is way, way, way more frightening than acting ever was. oh, yeah, it's the blank page. nobody writing a script. nobody making you look good