Giancarlo Giuseppe Alessandro Esposito (Italian: ; born April 26, 1958) is an American actor. He is best known for portraying Gus Fring in the AMC crime drama series Breaking Bad, from 2009 to 2011, as well as in its prequel series Better Call Saul, from 2017 to 2022. For this role, he won the Critics' Choice Television Award for Best Supporting Actor in a Drama Series and earned three nominations for the Primetime Emmy Award for Outstanding Supporting Actor in a Drama Series.

Esposito's other television roles include Federal Agent Mike Giardello in the NBC police drama series Homicide: Life on the Street (1998–1999), Sidney Glass / Magic Mirror in the ABC supernatural drama series Once Upon a Time (2011–2017), Tom Neville in the NBC science-fiction series Revolution (2012–2014), Dr. Edward Ruskins in the Netflix comedy-drama series Dear White People (2017–2021), Stan Edgar in the Amazon Prime Video superhero drama series The Boys (2019–present) and The Boys Presents: Diabolical (2022–present), and Moff Gideon in the Disney space western drama series The Mandalorian (2019–present), the lattermost of which earned him two Primetime Emmy Award nominations. He also portrayed American Baptist pastor and politician Adam Clayton Powell Jr. in the TV series Godfather of Harlem (2019–present) and appeared in Westworld (2016). Esposito voices antagonist Faraday in the Netflix anime series Cyberpunk: Edgerunners (2022). Esposito also voices Antón Castillo, the main antagonist of the video game Far Cry 6, who was modeled after Esposito's appearance. He was also included in the videogame Payday 2, as the supporting character, then antagonist "The Dentist".

He is also known for his appearances in several Spike Lee films, such as School Daze (1988), Do the Right Thing (1989), Mo' Better Blues (1990), and Malcolm X (1992). Esposito's other major films include Taps (1981), King of New York (1990), Bob Roberts (1990), Harley Davidson and the Marlboro Man (1991), Fresh (1994), The Usual Suspects (1995), Ali (2001), Last Holiday (2006), Gospel Hill (2008), Rabbit Hole (2010), Maze Runner: The Scorch Trials (2015), The Jungle Book (2016), Money Monster (2016), Okja (2017), Maze Runner: The Death Cure (2018), and Stargirl (2020).