NEW YORK — AMC says “Mad Men” is definitely coming back, but the new season won’t be on the air until 2012.

The network’s announcement today came amid reports of ongoing negotiations between Lionsgate, the studio that produces the series, and its creator-executive producer, Matthew Weiner.

The announcement took note of the delayed start in shooting the new season, which will be the series’ fifth. In the past, “Mad Men” has aired in the summer or early fall.

The much-acclaimed drama stars Jon Hamm as an advertising executive and divorced family man working in Manhattan in the 1960s.