Mad Me n fans, rejoice!

After protracted negotiations, AMC and producing studio Lionsgate reached an agreement today with creator Matthew Weiner for Seasons 5 and 6. Weiner's deal with Lionsgate opens the possibility for a seventh season, too.

No premiere date was announced in the AMC-Lionsgate release, but the fifth season is not slated to debut until early 2012.

Mad Men has won the Emmy for best drama for the past three seasons.

"I want to thank all of our wonderful fans for their support," Weiner says in the release. "I also want to thank AMC and Lionsgate for agreeing to support the artistic freedom of myself, the cast and the crew so that we can continue to make the show exactly as we have from the beginning. I'm excited to get started on the next chapter of our story."