PEOPLE has the exclusive first look of a chilling new video of the RHONY costars promoting the event.
In the clip, both are dressed as sexy nurses, a perfect costume choice given the evening’s sinister theme.
For the bash, SECOND at Kimpton Hotel Eventi — a premier event space overseen by Executive Chef Laurent Tourondel — will be transformed into what organizers call “an uncanny institution from another time and place.”
Attendees will be admitted into the Tourondel Psychiatric Hospital upon entering, where they will be immediately diagnosed by a team of specialists. Patients will then be allowed to wander freely through the wings of the clinic passing medical oddities, psychotic patients and a mysterious medical staff.
In addition to the night’s full open bars and music by The Misshapes, there will be performances from de Lesseps, 53 — who actually worked as a licensed practical nurse in Connecticut well before finding fame.
Music superstar Lil’ Kim will also take the stage, as will RuPaul’s Drag Race winner Violet Chachki. Morgan, 54, will be one of the party’s hosts.
“It’s so much fun to dress up as a nurse for Halloween, as I can highly exaggerate my humble background for the night,” de Lesseps told PEOPLE in an exclusive statement. “Headlining with Lil’ Kim is the icing on the pumpkin pie.”