Joining the previously announced Tony winner Alan Cumming (Cabaret, The Threepenny Opera), Christian Campbell ("Reefer Madness: The Movie Musical," "Big Love") and Thomas Dekker ("The Secret Circle," "A Nightmare on Elm Street") are Lea DeLaria (On the Town, The Rocky Horror Show), Amy Spanger (Kiss Me, Kate; Elf), John Kassir (Reefer Madness), Lesli Margherita (Matilda The Musical), Jenna Leigh Green (Wicked) and James Snyder (If/Then, Cry-Baby).   

The concert, directed by Ilana Ransom Toeplitz and produced by Shoshana Feinstein, will benefit Baby Quest Foundation.  

The musical, which features lyrics by Kevin Murphy, music by Dan Studney and book by Murphy and Studney, was adapted into a film in 2005, featuring Kristen Bell, Ana Gasteyer and Spanger. 

Here's how the event is billed: "Since its original Off-Broadway production in 2001, this award-winning musical has taken the world by storm and achieved a cult status in the vein of Rocky Horror and Hedwig and the Angry Inch, due in large to the successful award-winning Sundance film (also starring Cumming & Campbell). Inspired by the 1936 film of the same name, this raucous musical comedy takes a tongue-in-cheek look at the hysteria caused when clean-cut kids fall prey to marijuana, leading them on a hysterical downward spiral filled with evil jazz music, sex and violence."

A limited number of $25 "Reefer Den” tickets will be sold, for which participants will be able to watch the concert live-streamed from the New World Stages foyer, complete with a cash bar and surprise guest appearances.

New World Stages is located at 340 West 50th Street. For more information visit ReeferMadnessMusical.com and babyquestfoundation.org.