For the first time, U.S. Internet advertising revenue has surpassed that of broadcast television thanks to sharp growth in mobile and digital video ads.

That's according to a report from the Interactive Advertising Bureau, which said Thursday that Internet advertising revenue rose 17 percent to a record $42.8 billion in 2013. Broadcast TV ad revenue, in comparison, was $40.1 billion in 2013, led by programs such as NBC's "Parks and Recreation," starring Amy Poehler.