He also provides the voice of Baileywick, the castle steward in the Disney Junior television show Sofia the First and narrated the sitcom Mixology.

Gunn was born in Washington, D.C.[1] His father worked in the FBI where he started off as an agent but transitioned into becoming a ghostwriter and speechwriter for J. Edgar Hoover.

Gunn also played a version of himself as a reporter for the fictional Fashion TV in two episodes of ABC's Ugly Betty in February 2007[9] and later guest starred on Drop Dead Diva in August 2009 as himself.

Gunn left Parsons in 2007 and joined Liz Claiborne, Inc. as the company's chief creative officer in March of that year.

[10] In April 2007, Abrams Image Publishers released Gunn's book A Guide to Quality, Taste and Style, co-written with Kate Moloney, cover photo by Markus Klinko & Indrani.

In May 2009, Gunn served as commencement speaker at the Corcoran College of Art and Design, and received an honorary doctorate from the institution.

[15] On September 7, 2018, it was confirmed that Gunn, along with Heidi Klum would not be returning to Project Runway for a 17th season on Bravo as they both signed a deal to host a fashion competition show on Amazon Video titled Making the Cut.

In August 2007, "Tim Gunn's Podcast (a reality chamber opera)" by Jeffrey Lependorf premiered at the Cornelia Street Cafe in Manhattan.

In the series, which is written by Project Runway fan Mark Sumerak and illustrated by Jimenez, Gunn dons the Iron Man armor to foil an attack against the New York Fashion Museum.

[18] Gunn appeared in the opening skit on the 62nd Primetime Emmy Awards to style Jimmy Fallon to look like Bruce Springsteen, from his Born in the U.S.A. album.

[23] In June 2020, in honor of the 50th anniversary of the first LGBTQ Pride parade, Queerty named Gunn among the fifty heroes "leading the nation toward equality, acceptance, and dignity for all people".