Happy Halloween!

1981 Hallmark wall decoration

In honor of  Halloween, check out these great guest star monster moments from The Muppet Show:

Guest Stars Announced for ABC's The Muppets!

Through teases and interviews leading up to the premiere of "The Muppets," we've compiled a list of guest starts who are set to appear on the new series. 

Here's who we can confirm so far: (We'll keep updating the list as more are announced)

Note: These are only the stars appearing as themselves. 

Updated: 11.17.2015

Elizabeth Banks: (Test show & pilot)

Topher Grace: (Test show)

Imagine Dragons:

Tom Bergeron:

Josh Groban:

Jay Leno:

Tracy Anderson:

Laurence Fishburne:

 Reza Aslan:

 Lea Thompson:

Liam Hemsworth:

Christina Applegate:

Nick Offerman:

Ed Helms:

Reese Witherspoon:

Kristen Chenoweth:

Jason Bateman:

Pentatonix:

Chelsea Handler:

Joseph Gordon-Levitt:

Dave Grohl:

Mindy Kaling:

Echosmith:

Keegan Michael Key and Jordan Peele:

Ian Ziering:

Joan Jett:

RuPaul: 

Ingrid Michaelson:

Willie Nelson:

Jack White:

Other stars NOT starring as themselves in the series include:

Jere Burns as Carl, Meagan Fay as Holly, Riki Lindhome as Becky:

Utkarsh Ambudkar as network branding guru Pache:

June Diane Raphael as Lucy Royce:

Phil LaMarr as Miss Piggy's Dr.: