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Glee is gearing up for their highly anticipated fourth season, in which A-list guest stars Kate Hudson and Sarah Jessica Parker have already been confirmed. ET caught up with the show's reigning on-again/off-again couple Lea Michele and Cory Monteith at Comic-Con, where they dished about working with their mega famous guest stars and having the whole cast back for season four!

Lea revealed that Kate will be working primarily with her storyline while Sarah Jessica will be working closely with Chris Colfer, and shared her excitement at getting to share the screen with the popular actress.

"Oh my God, I'm like obsessed with her," Lea admitted. "I love her. She's one of the greatest comedic actresses right now, and I just think she's so pretty."

Video: Behind the Scenes of the 'Glee' Season Finale

She was also clearly happy that the entire original cast will be back this year -- especially Cory, her real life boyfriend.

"Oh my gosh, I can't work without Cory at this point," she said. "And you know, I really get Cory and Chris. These guys -- I can't play Rachel without them."

Related: Lea Michele on Virginity Scene with Cory Monteith

Cory also echoed his and some of his fellow Glee co-stars' relief that they're returning to the hit show, amidst persistent rumors that they would not be returning next season.

"I'm just excited they found a way -- a really interesting way I might add -- to incorporate people who you know, maybe were scared that they weren't going to be on the show, now all of a sudden it's gonna be everybody back on the show this year," he said.

"I love having a job," he joked. "This is fantastic."

Check out the video to hear Cory dish on the upcoming Glee crossover with Archie Comics!