Steven Yeun (Korean: 연상엽; born Yeun Sang-yeop, December 21, 1983) is a South Korean-American actor. Yeun initially rose to prominence for his role as Glenn Rhee in the television series The Walking Dead (2010–2016). He later starred in and executive produced Minari (2020), earning him critical acclaim and a nomination for the Academy Award for Best Actor, becoming the first Asian American actor to be nominated in this category. Yeun has also appeared in the films I Origins (2014), Okja (2017), Mayhem (2017), Burning (2018), Sorry to Bother You (2018), and Nope (2022), and has voiced main characters in television series such as Voltron: Legendary Defender (2016–2018), Tuca & Bertie (2019), and Invincible (2021-present), among others.

Steven Yeun plays as Danny Cho in Invincible.
Steven Yeun is the top #1 member of the cast and appears in 10 episodes.

Jonathan Kimble Simmons (born January 9, 1955) is an American actor. He has been cited as one of the greatest contemporary character actors, and has appeared in over 200 film and television roles since his debut in 1986. He is an Academy Award, BAFTA Award, Golden Globe Award, Screen Actors Guild Award, and Critics Choice Award winner, among other accolades. His film roles include J. Jonah Jameson in Sam Raimi's Spider-Man trilogy (2002–2007), tobacco industry executive B.R. in Thank You for Smoking (2005), Mac MacGuff in Juno (2007), music instructor Terence Fletcher in Whiplash (2014), Bill in La La Land (2016), William Frawley in Being the Ricardos (2021), and Commissioner James Gordon in the DC Extended Universe films Justice League (2017), Zack Snyder's Justice League (2021), and Batgirl (2022). He reprised his role as Jameson in various Marvel media unrelated to the Sam Raimi trilogy, including multiple animated series and the Marvel Cinematic Universe/Sony's Spider-Man Universe films Spider-Man: Far From Home (2019), Venom: Let There Be Carnage, and Spider-Man: No Way Home (both 2021), and the web series TheDailyBugle.net (2019; 2021). On television, he is known for playing Dr. Emil Skoda on the NBC series Law & Order, white supremacist prisoner Vernon Schillinger on the HBO series Oz, and Assistant Police Chief Will Pope on TNT's The Closer. From 2017 to 2019, he starred as Howard Silk in the Starz series Counterpart. He has also appeared in a series of commercials for Farmers Insurance and starred in the third season of the IFC comedy series Brockmire. In 2020, he had recurring roles on the miniseries Defending Jacob and The Stand. As a voice artist, he is known for voicing Cave Johnson in the video game Portal 2 (2011), Tenzin in The Legend of Korra (2012–2014), Stanford “Ford” Pines in Gravity Falls (2015–2016), Kai in Kung Fu Panda 3 (2016), Mayor Leodore Lionheart in Zootopia (2016), the titular character in Klaus (2019), Pig Baby in Season 4 of the HBO Max animated series Infinity Train (2021), and Nolan “Omni-Man” Grayson in the Amazon Prime action animated series Invincible (2021). He has been the voice of the Yellow M&M since 1996.

J.K. Simmons plays as Franklin York in Invincible.
J.K. Simmons is the top #2 member of the cast and appears in 8 episodes.

Sandra Oh (born July 20, 1971) is a Canadian actress. She is primarily known for portraying the role of Dr. Cristina Yang on ABC's Grey's Anatomy, for which she has won a Golden Globe and Screen Actors Guild award. She also played notable roles in the feature films Under the Tuscan Sun and Sideways, and had a supporting role on the HBO original series Arli$$.

Sandra Oh plays as Dr. Ji-Yoon Kim in Invincible.
Sandra Oh is the top #3 member of the cast and appears in 6 episodes.