Glenn Franklin Howerton III, born on April 13, 1976, in Japan, is an accomplished American actor, writer, and producer, widely recognized for his role as Dennis Reynolds in the long-running FX/FXX sitcom It's Always Sunny in Philadelphia. Howerton not only stars in the series but also co-developed it, serving as an executive producer and writer alongside his fellow cast members, which has contributed to the show's cult status since its debut in 2005.

Growing up in a military family, Howerton moved frequently during his childhood, eventually settling in Montgomery, Alabama. He attended Auburn University, where he studied acting and graduated with a degree in Fine Arts. His passion for the craft led him to further his education at the Tisch School of the Arts in New York City, where he honed his skills in theater and performance.

Howerton's career began to take off in the early 2000s with various television appearances. He landed a recurring role on the NBC sitcom Freaks and Geeks and later appeared in ER. However, it was in 2005 that he achieved significant recognition with It's Always Sunny in Philadelphia, where his portrayal of the narcissistic and self-absorbed Dennis Reynolds became a defining aspect of the show. The series has garnered a loyal following, earning critical acclaim and numerous awards over the years.

In addition to his work on It's Always Sunny in Philadelphia, Howerton has showcased his versatility as an actor through various notable performances. He played Cliff Gilbert in the sitcom The Mindy Project from 2012 to 2017, demonstrating his comedic talent in a different setting. He also appeared in the first season of the critically acclaimed anthology series Fargo as Don Chumph in 2014, further expanding his repertoire.

More recently, Howerton starred as Jack Griffin in the NBC comedy series A.P. Bio, which ran from 2018 to 2021. His performance in this series was well-received, allowing him to continue exploring complex comedic characters. In 2023, he took on the role of Jim Balsillie in the film BlackBerry, adding to his impressive filmography.

Outside of his acting roles, Howerton co-hosted The Always Sunny Podcast from 2021 to 2023 alongside his fellow cast members Rob McElhenney and Charlie Day, providing fans with insights into the show and their experiences working together.

In his personal life, Howerton is married to actress Jill Latiano, with whom he tied the knot on September 8, 2009. The couple shares two children and maintains a relatively private family life despite Howerton's public persona. With a career spanning over two decades, Glenn Howerton continues to be a prominent figure in the entertainment industry, known for his unique blend of humor and dramatic talent.