Hulu Plus now has more than 2 million subscribers just 21 months after first coming online. Hulu CEO Jason Kilar announced the milestone at an Ad Age conference earlier this week, according to IP&TV News. Prior to launching Hulu Plus, Hulu served mostly as a streaming website that offered a limited number of episodes per show. The subscription service, which costs $7.99 a month, now gives users access to shows’ entire archives and also lets them view content on a large variety of platforms including through web-connected Blu-ray players, DVR boxes, laptops, smartphones and tablets. While Hulu Plus’s subscriber growth has been impressive, it still has a long way to go to catch Netflix, which has an estimated 23.4 million streaming subscribers in the United States.