MasterClass, the website that brings celebrity-taught classes to the public, like tennis lessons from Serena Williams and photography instruction from Annie Leibovitz, has raised $80 million to expand internationally. The Series D funding, led by IVP, will also be used to bring more celebrities to MasterClass. The company currently offers 39 classes, with plans to hit 50 by the end of the year. In the last year, MasterClass has added a writing class with Margaret Atwood, a comedy lesson from Judd Apatow and more. Co-founder and CEO David Rogier told TechCrunch this morning that he hopes to bring Elon Musk, LinkedIn founder Reid Hoffman and JK Rowling on board soon.