Speaking to Digital Spy, several cast members explained that they would like to work with the actor.
Kevin McHale said: "Christopher Walken is kind of becoming the collective [choice]. We all want Christopher Walken on this show."
Jenna Ushkowitz proposed a cameo for Hugh Jackman, while Ashley Fink joked that she would like to see Barack Obama make an appearance.
Lea Michele said: "We don't really know who's going to be on our show. We just find out a couple days prior and it's such an awesome surprise. And the great thing is that they write these roles specifically for the actors that they pick, so we leave it in the writers' hands."
Meanwhile, Amber Riley joked that she is "kind of sick of stars", although she added that former guest Gwyneth Paltrow was "amazing on set".
Glee will return for a new season on September 20 on Fox. Glee: The 3D Concert Movie is out now in the US and will open nationwide in the UK on Friday.
Watch the cast of Glee chatting about their dream guest stars below:
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