It won't take long for Kate Hudson to make an impact on Glee Season 4.

According to Lea Michele, who spoke to William Keck of TV Guide Magazine at the 11th Annual Chrysalis Butterfly Ball last week, the movie star will premiere on the September 13 premiere as a New York Academy of the Dramatic Arts dance instructor.

What will that mean for Michele's Rachel Berry?

"Dance is not Rachel's strong point, but as a freshman it's a requirement class she has to take," Michele teases. "It will put Rachel in a very vulnerable place, stuck with a teacher who doesn't make it easy for her."

Kurt, meanwhile, will end up in New York City after all… but not as a NYADA student at first.

Instead, he will be involved with Sarah Jessica Parker, Chris Colfer revealed, who comes on board as the character's "manager of sorts," according to the actor, "but not in a performance sense."

In other recently Glee news, American Idol runner-up Jessica Sanchez is nearing a deal to appear on multiple episode in late 2012 or early 2013.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.