Hulu CEO Jason Kilar announced plans to resign his post at the company some time in the first quarter of 2013 on Hulu’s official blog on Friday. In his official resignation letter, Kilar said he was working with the company’s board “to ensure there is ample runway to manage this transition” and that current Hulu CTO Rich Tom would be stepping down with him. Kilar didn’t give a specific reason for his departure but said that his “decision to depart has been one of the toughest I’ve ever made” and that he was “thankful” for his time running the company. Kilar’s resignation comes less than a month after the company announced it had passed 3 million paid subscribers for its Hulu Plus service.