“Young Frankenstein,” a live stage musical version of Mel Brooks hysterical 1974 comedy film, is an absolute hoot in its new production at Chicago’s intimate Mercury Theatre on Southport.

WIth priceless comic bits, great costumes, dancing, and singing that is notably excellent, “Young Frankenstein” is underpinned by a bullet-proof script adapted from the movie, which in my estimation is Mel Brooks’ funniest.

If you haven’t seen the film, then you will especially be in stitches in this spin-off of the classic 19th century Mary Shelley tale Frankenstein’s monster, a cadaver brought to life with disastrous consequences. Mel Brook’s version brings us the American grandson of Dr. Frankenstein (Sean Fortunato)—also a medical doctor—who travels to Transylvania on inheriting the castle and infamous laboratory that generated the original monster.

This musical at the Mercury (like Brooks’ film) spoofs the three 1930s Frankenstein films, with their overheated melodrama and exaggerated horror.

“Young Frankenstein” happens to be the Chicago premiere of a 2017 London version, revised from the Broadway musical of 2007. The recount of so many hilarious moments from the film are extended by the music and dance. The score is a satisfying pastiche of some classic showtunes. “There Is Nothing Like a Brain” for example, samples South Pacific's “There Is Nothing Like a Dame” In parts, with other musical motifs patched in too.

What is most astounding, though, is how good the singing, dancing, and musical performances are at this Mercury Theater production. Soprano Isabella Andrews, who plays Dr. Frankenstein’s voluptuous lab assistant Inga, brings an operetta-worthy voice; and likewise mezzo-soprano Lillian Castillo, who plays Dr. Frankenstein’s uptight fiance Elizabeth. And still they are as funny as all get out.

Also notable: bass-baritone Jonah D. Winston as Inspector Kemp, a Strangelovian character with a wooden arm, and leg, and flawless comic timing. (Winston’s 2021 performance was galvanizing in Theater Wit’s Mr. Burns.) Even the Monster (Andrew McNaughton), limited to howls and moans when faced with fire, turns out to have a remarkable voice, in a show-stopping number at the end.

Particularly entertaining are the roles of the housekeeper, Frau Blucher (Mary Robin Roth), and the hunchbacked Igor (Ryan Stajmiger), garnering incredible laughter with their many signature punchlines and bits. Even the wigs (Keith Ryan) deserve a nod. After all, the Bride of Frankenstein wig transformation for Elizabeth, following her tryst with the Monster, is a key visual punchline.

One tiny quibble: the special effects for The Monster’s lab transformation could use a bit more lightning bolts and smoke. Running through December 31, “Young Frankenstein” at Chicago’s Mercury Theater, 3745 N. Southport is a must-see event. But be warned: once may not be enough!