Seth Benjamin Green (né Gesshel-Green; born February 8, 1974) is an American actor. He made his film debut with a role in the comedy-drama film The Hotel New Hampshire (1984), after which he played supporting roles in comedy films throughout the 1980s, including Radio Days (1987) and Big Business (1988).

In the 1990s and 2000s, Green began appearing in comedy films such as Idle Hands (1999), Rat Race (2001), Without a Paddle (2004), and Be Cool (2005). He also became known for portraying Scott Evil, the son of Dr. Evil, in the Austin Powers film series (1997–2002). Green also took on serious roles in films, including The Attic Expeditions (2001) and Party Monster (2003). He voiced Howard the Duck in several films and series in the Marvel Cinematic Universe, including Guardians of the Galaxy (2014), Guardians of the Galaxy Vol. 2 (2017), and Guardians of the Galaxy Vol. 3 (2023), as well as in the animated series What If...? (2021–present). In 2019, he wrote, directed, and starred in the comedy-drama film Changeland.

Green's first leading role on television was in the ABC sitcom Good & Evil in 1991, for which he received a Young Artist Award. Green later drew attention for his supporting roles as Oz, a teenage guitarist and the boyfriend of Willow Rosenberg, in the fantasy television series Buffy the Vampire Slayer (1997–2000), as well as for voicing Chris Griffin in the adult animated comedy series Family Guy (1999–present) on Fox. He also voiced Leonardo in the Nickelodeon animated series Teenage Mutant Ninja Turtles (2014–2017) and the Joker in the Mass Effect video game series (2007–2012). Green created, directed, wrote, and produced the adult animated comedy series Robot Chicken and its spin-offs (2005–present), which earned him three Primetime Emmy Awards and five Annie Awards.

The above description is taken from the Wikipedia article "Seth Green," licensed under CC-BY-SA, with a full list of authors in Wikipedia.