Are nerds going to grow up and rule the world? Maybe. Are they going to grow up and make delightful late-night segments? Definitely. On Thursday night, Anna Kendrick stopped by the Late Show with nothing to promote, and so instead of segueing to her latest film, she was free to geek out with Stephen Colbert about her 13-hour Lord of the Rings marathons (she’s a total Pippin), discuss the time Stephen Sondheim complimented her teeth, and give a very pedantic explanation about why the Pitch Perfect movies are not technically “musicals.” Then they sang “Falling in Love Is Wonderful” from Annie Get Your Gun. The word of teenage geekdom is wide enough for musical theater and Tolkien!