Early life

Born and raised in St. Louis, Missouri in a Roman Catholic family of Irish descent, he has four brothers and one sister. He was raised between St. Louis and Manchester, Missouri. His brothers are actor and political writer Matt Gunn, Brian, and former Senior Vice President with Artisan Entertainment, Patrick. His other brother is James is a screenwriter/director, who took acting classes with Sean when they were children. Later in life, he introduced James to his future wife, Jenna Fischer. He also has a sister named Beth. Gunn's father, James F. Gunn, is a partner and corporate attorney with the law firm Thompson Coburn in St. Louis. Gunn's surname is derived from the Irish name MacGilGunn, meaning "sons to the servants of the god of the dead". Therefore, Gunn means "God of the Dead".

Gunn attended the Jesuit St. Louis University High School (class of 1992). Gunn and his brothers are all graduates of Saint Louis University High School in the Kings Oak neighborhood of St. Louis. He then graduated from DePaul University's Theatre School in 1996. After graduation, he started a theater company with friends.

Career

In 1995 Gunn played Sammy Capulet in the B Film Tromeo and Juliet. In 2000, he guest starred in the second episode of Gilmore Girls as "Mick" a DSL cable installer. As the first season continued, Gunn was brought back to play the recurring role of Kirk Gleason, one of Stars Hollow's most eccentric citizens. Since 2002 until the end of the series in 2007, Gunn was a regular cast member of the show. He also had a recurring role on October Road as "Rooster".

Although he is best known for his regular Gilmore Girls role, he also has several television show guest appearance credits, including Angel, 3rd Rock from the Sun, Yes, Dear, True Jackson, VP, Andy Richter Controls the Universe, and Bunheads. Gunn can also be seen in commercials as an "agent" for the text message information service KGB.com. In films, Gunn has also had several roles, the most substantial being "Alien Orphan/Doug" in The Specials, for which he also received a co-producer credit.

In 2003, Gunn starred in the featurette The Man Who Invented the Moon, directed by fellow Goodman School of Drama alum and Gilmore Girls cast member John Cabrera. Gunn and Cabrera have been close artistic colleagues since their school days in Chicago back in the mid-nineties.

Along with his brothers James and Brian, he is a creator and actor in the spoof porn series, PG Porn. He also had a brief role as a computer maintenance man on the Nickelodeon show, True Jackson VP. Gunn starred in a series of television commercials for Knowledge Generation Bureau. He appeared in the 2010 film Super, written and directed by his brother James.

Sean is also the voice actor behind the character of "Swan" in the Warner Brothers video game Lollipop Chainsaw, written by his brother James.

Gunn guest-starred in Glee ("Makeover", Season 4) as committee member Phineas Hayes.

In 2013, he provided stand-in work for the characters of Rocket Raccoon and Thanos for the film Guardians of the Galaxy, which was written and directed by his brother. The characters were later voiced by Bradley Cooper and Josh Brolin. He also played the role of Kraglin, Yondu Udonta's second in command.

In 2014 he held a supporting role in Bones on FOX in season 10 episode 5 "The Corpse at the Convention".

With Nick Holmes he has starred in Gilmore Girls, Super, PG Porn, and Guardians of the Galaxy. He has also posed for Holmes's photography portraits.

Personal life

Gunn's nickname is "The Judge." He is 6' (1.83 m) tall.

The character, "Gunn," on the TV series, Angel (1999), was named such after the creator, Joss Whedon, worked with both Sean and his brother, James Gunn.

He is the former roommate of fellow DePaul classmate, Judy Greer. He is the cousin of Mark Gunn, former NFL football player.

He plays fantasy baseball with Rush lead singer, Geddy Lee.

He is the former roommate and DePaul University classmate of fellow Gilmore Girls cast member, John Cabrera.

Filmography

Film

Year	Title	Role	Notes
1996	Tromeo and Juliet	Sammy Capulet/Performer
1997	Stricken	Guffy
1999	The Auteur Theory	Tori York
2000	The Specials	Alien Orphan/Co-Producer
2001	Love, Sex & Murder	The Waiter/Associate Producer	Short
2001	Pearl Harbor	Traction Sailor
2003	The Man Who Invented the Moon	Sammy Hughes/Executive Producer	Short
2004	Fish Out of Water	Jim	Short
2005	Jesus, Mary and Joey	Stevie
2008	Pants on Fire	PK
2010	Super	Toby
2012	The Giant Mechanical Man	George
2013	Who the F Is Buddy Applebaum	Pinto
2014	Guardians of the Galaxy	Kraglin/On Set Rocket
2015	The Hive	Dr. Baker
2016	The Belko Experiment	Marty Espenscheid
2016	Geezer	Ted
2016	Po	Ben
2017	Guardians of the Galaxy Vol. 2	Kraglin

Television

Year	Title	Role	Notes
1999	Any Day Now	Clerk	Episode: "A Parent's Job"
2000	Brutally Normal	Lenny	2 episodes
1999-2000	Angel	Mars/Lucas	2 episodes
2000	The Michael Richards Show	Dennis	Episode: "Simplification"
2000-2007	Gilmore Girls	Kirk Gleason/Swan Man/Mick/Performer	137 episodes; Series regular
2001	Inside Schwartz	Focus Group Guy #2	Episode: "Bless Me Father, for I Have Fired You"
2001	DAG	Ryan	Episode: "Prom"
2001	3rd Rock from the Sun	Attendant	Episode: "You Don't Know Dick"
2001	Going to California	Joey 'Fuzz' Fucetti	4 episodes
2002	Yes, Dear	David Scott	Episode: "Making Baby"
2002-2003	Andy Richter Controls the Universe	Phil	3 episodes
2004	Gilmore Girls Backstage Special	Himself	TV Movie
2007-2008	October Road	Rooster	6 episodes
2008	Scream Queens	Himself - Guest	Episode: "Episode #1.4"
2008	Sparky & Mikaela	Dude	Episode: "Pilot"
2008	Humanzee!	Humanzee	Episode: "Pilot"
2008-2009	PG Porn	Peppermint Patty/Bill Scrotey/Jason/Creator/Writer	TV Series Short; 8 episodes
2009	The Jace Hall Show	Himself	Episode: "James Gunn & Brutal Legend"
2009	True Jackson, VP		Episode: "ReTRUEnion"
2011	The Homes	Paul
2011	For a Green Card	Andrew	Episode: "What Could Possibly Go Wrong?"
2011	The Morning After		TV Series Short; 4 episodes
2012	Antiques Roadshow	Himself - Feedback Booth Participant	Episode: "Junk in the Trunk 2"
2012	Glee	Phineas Hayes	Episode: "Makeover"
2012-2013	H+	Jason O'Brien	9 episodes
2012-2013	Bunheads	Sebastian	2 episodes
2013	The Education of Eddie and Mortimer	Creepy Carl	TV Movie
2014	The Victoria Uyen Show	Himself	Episode: "Guardians of the Galaxy Premiere"
2014	Bones	Dr. Howard Fitch	Episode: "The Corpse at the Convention"
2016	Gilmore Girls: A Year in the Life	Kirk Gleason	TV Mini-Series
2016	Superstore	Card Shopper	Episode: "Secret Shopper"

[ Source: Wikipedia ]