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Tarnished Manhattan social swan Tinsley Mercer Mortimer will return to modeling by walking the runway at New York Fashion Week.

The onetime most glamorous New York socialite turned “Real Housewives” reality star will appear Tuesday in a show for Garo Sparo — the line by former “Project Runway” contestant Gary Spampinato.

An insider told Page Six, “Tinsley is closing out the show in a very dramatic gown.”

The presentation is part of STYLE360, which is also hosting collections from Serena Williams and Rosario Dawson.

Former Park Avenue princess and sample-size toast of New York society Mortimer was so oft-photographed that designers fought to dress her. She was a beauty ambassador at Dior and sat front row at a host of Fashion Week events, also walking in a 2005 show for then-hot apparel Heatherette, co-founded by club kid Richie Rich. Nicky Hilton, Lydia Hearst and Amanda Lepore also walked in the show.

Following her 2009 split from Topper Mortimer, dividing the Upper East Side social sphere, she dallied with epically named and equally boring German aristo Prince Casimir Sayn-Wittgenstein-Sayn. Then she murdered her society mystique with the cacophonous CW reality show “High Society,” with its manufactured catfights, crude displays of vanity and nauseating lowbrow party pals.

A Slate review called Mortimer “a socialite presenting a compelling study in contemporary vulgarity.”

Tinsley fled to Palm Beach, Fla., around 2011 to “be near her mother, Dale Mercer.”

She suffered further humiliation when she was arrested for trespassing at the home of an ex, sugar scion Nico Fanjul, in April 2016, resulting in an unfortunate police mug shot.

But to the Tinz’s credit, she stood up against the powerful Fanjul family, revealing her allegedly violent relationship with Nico; picked herself up and returned to New York; and landed a more muted role on “The Real Housewives of New York City,” where she is a returning cast member.