Sonja Morgan flashed her undies on Sunday during a Tribeca Talks event in New York City celebrating 10 years of RHONY.
The 54-year-old reality star donned a short black jacket dress for a panel talk at Spring Stdios as part of the second Tribeca TV Festival.
The outfit featured a plunging neckline and a high thigh slit that showed her black lacy underwear.
TV festival: Sonja Morgan wore a short black dress on Sunday to the Tribeca TV Festival in New York City
Sonja completed her outfit with black velvet loafers with a red family crest stag from her Sonja Morgan Shoes collection.
She had her long blonde hair down below her shoulders and accessorized with sparkling earrings and ring.
Sonja was joined at the Tribeca Talks event by RHONY co-stars Tinsley Mortimer, 43, and Dorinda Medley, 53.
Tinsley wore a long-sleeved floral print dress with an asymmetrical hem.
Reality star: The 54-year-old reality star participated in a Tribeca Talks event celebrating 10 years of The Real Housewives Of New York City
Dorinda wore a bright pink pussy-bow blouse along with black capri pants.
RHONY executive producers Andy Cohen, 50, and Lisa Shannon, 40, also took part in the panel.
Andy kept it casual in a blue plaid shirt and faded blue jeans.
Floral print: Tinsley Mortimer wore a floral print dress with asymmetrical hem to the event
Capri pants: Dorinda Medley paired a pink pussy-bow blouse with black capri pants
Lisa looked lovely in a sleeveless red sheath dress with black shoulder trim.
Sonja was previously married to Quincy Adams Morgan, 88, whose great-grandfather J.P. Morgan founded banking giant J.P. Morgan & Co.
They were married from 1998 to 2006 and have 17-year-old daughter Quincy Adams Morgan together.
The producers: RHONY executive producers Andy Cohen and Lisa Shannon joined the panel
RHONY premiered on March 4, 2008 on Bravo as the second installment in The Real Housewives franchise following The Real Housewives Of Orange County.
The second Tribeca TV Festival also presented Tribeca Talks with Breaking Bad star Bryan Cranston, 62, and film critic David Edelstein, 69; an interview of Rosario Dawson by Laverne Cox and a panel celebrating 10 years of Shark Tank.
The Tribeca TV festival also included several season premiere screenings as well as fall pilot season world premieres.
Teaming up: Dorinda, Tinsley, Andy, Lisa and Sonja got together on the carpet at Spring Studios