Glenn Howerton More at IMDbPro »

Actor:

1. "American Dad!" .... Animal Control Guy #1 (1 episode, 2009)
       - Weiner of Our Discontent (2009) TV episode (voice) .... Animal Control Guy #1
2. Crank: High Voltage (2009) (uncredited) .... Doctor
   ... aka Crank 2 (USA: alternative title)
3. "It's Always Sunny in Philadelphia" .... Dennis Reynolds (45 episodes, 2005-2008)
   ... aka "It's Always Sunny" (USA: promotional title)
       - The Nightman Cometh (2008) TV episode .... Dennis Reynolds
       - The Gang Gets Extreme: Home Makeover Edition (2008) TV episode .... Dennis Reynolds
       - The Gang Cracks the Liberty Bell (2008) TV episode .... Dennis Reynolds
       - Sweet Dee Has a Heart Attack (2008) TV episode .... Dennis Reynolds
       - Dennis Reynolds: An Erotic Life (2008) TV episode .... Dennis Reynolds
         (40 more)
4. It's Always Sunny in Philadelphia Season 3: Meet the McPoyles (2008) (V) .... Dennis Reynolds
5. It's Always Sunny in Philadelphia: Sunny Side Up (2008) (V) .... Dennis Reynolds
6. It's Always Sunny in Philadelphia Season 3: Sunny Side Up (2008) (V) .... Dennis Reynolds
7. It's Always Sunny in Philadelphia Season 3: Dancing Guy (2008) (V) .... Dennis
8. Happy Wednesday (2008) .... Spencer Scott
9. The Strangers (2008) .... Mike
10. It's Always Sunny in Philadelphia: Making of Season 1 & 2 (2007) (V) .... Dennis Reynolds
11. Two Weeks (2006) .... Matthew Bergman
12. Crank (2006) .... Doctor
13. Serenity (2005) .... Lilac Young Tough
14. Must Love Dogs (2005) .... Michael
15. "ER" .... Dr. Nick Cooper (6 episodes, 2003)
        - Freefall (2003) TV episode .... Dr. Nick Cooper
        - Death and Taxes (2003) TV episode .... Dr. Nick Cooper
        - The Greater Good (2003) TV episode .... Dr. Nick Cooper
        - Out of Africa (2003) TV episode .... Dr. Nick Cooper
        - Shifts Happen (2003) TV episode .... Dr. Nick Cooper
          (1 more)
16. E.D.N.Y. (2003) (TV) .... Paul Webster
17. "That Was Then" .... Noah Benjamin (1 episode)
        - Under Noah's Certain Terms (????) TV episode .... Noah Benjamin
18. "That '80s Show" .... Corey Howard (13 episodes, 2002)
        - Sophia's Depressed (2002) TV episode .... Corey Howard
        - Beach Party (2002) TV episode .... Corey Howard
        - Road Trip (2002) TV episode .... Corey Howard
        - Punk Club (2002) TV episode .... Corey Howard
        - Double Date (2002) TV episode .... Corey Howard
          (8 more)
19. "The Job" .... Young Guy (1 episode, 2002)
        - Gay (2002) TV episode .... Young Guy
20. Monday Night Mayhem (2002) (TV) .... Dick Ebersol
    

Writer:

• In Production
• 2000s

1. Boldly Going Nowhere (2009) (TV) (in production) (writer)
   
   
2. "It's Always Sunny in Philadelphia" (45 episodes, 2005-2008)
   ... aka "It's Always Sunny" (USA: promotional title)
       - The Nightman Cometh (2008) TV episode (developer) (written by)
       - The Gang Gets Extreme: Home Makeover Edition (2008) TV episode (developer) (written by)
       - The Gang Cracks the Liberty Bell (2008) TV episode (developer) (written by)
       - Sweet Dee Has a Heart Attack (2008) TV episode (developer)
       - Dennis Reynolds: An Erotic Life (2008) TV episode (developer) (written by)
         (40 more)
   

Producer:

• In Production
• 2000s

1. Boldly Going Nowhere (2009) (TV) (in production) (executive producer)
   
   
2. "It's Always Sunny in Philadelphia" (executive producer) (20 episodes, 2005-2008)
   ... aka "It's Always Sunny" (USA: promotional title)
       - Mac and Dennis: Manhunters (2008) TV episode (executive producer)
       - Mac Is a Serial Killer (2007) TV episode (executive producer)
       - The Gang Finds a Dumpster Baby (2007) TV episode (executive producer)
       - Dennis and Dee Get a New Dad (2006) TV episode (executive producer)
       - Charlie Goes America All Over Everybody's Ass (2006) TV episode (executive producer)
         (15 more)
   

Soundtrack:

1. "It's Always Sunny in Philadelphia" (2 episodes, 2006-2008)
   ... aka "It's Always Sunny" (USA: promotional title)
       - Paddy's Pub: The Worst Bar in Philadelphia (2008) TV episode (performer: "It's So Hard to Say Goodbye to Yesterday")
       - The Gang Goes Jihad (2006) TV episode (performer: "More than words")
   

Self:

1. "Free Radio" .... Himself (1 episode, 2009)
       - Anna's Date (2009) TV episode .... Himself
2. "Talkshow with Spike Feresten" .... Himself (1 episode, 2008)
       - Glenn Howerton (2008) TV episode .... Himself
3. Two Weeks: Learning to Live through Dying (2007) (V) .... Himself
4. "The View" .... Himself (1 episode, 2007)
       - Episode dated 7 September 2007 (2007) TV episode .... Himself
5. "Square Off" .... Himself (1 episode, 2006)
       - Episode #1.13 (2006) TV episode .... Himself