Mario Grete is a German voice actor known for his work in dubbing foreign productions, particularly anime series and films, for the German-speaking market. He was born in 1960. Beyond his voice work for screen productions, Grete has a background in theater, having performed on stages in Hamburg, Hanover, and Berlin, including an appearance at the Delphi-Theater in Hamburg. He has also appeared in guest roles on German television series such as Doppelter Einsatz, Faust, and Tatort.

Grete is most recognized within the anime community for his contributions to the German dubs of several notable series and films. He voices the character Griamore in the long-running fantasy series The Seven Deadly Sins, a role he has reprised across multiple installments including The Seven Deadly Sins: Revival of The Commandments, The Seven Deadly Sins: Imperial Wrath of The Gods, and The Seven Deadly Sins: Signs of Holy War. His film work includes providing the German voice for the character Tomizawa in Makoto Shinkai's The Place Promised in Our Early Days.

His other prominent anime dubbing credits include the role of Scorponok in the series Beast Wars: Transformers, as well as serving as the narrator and voicing the character Noventa for the German adaptation of Mobile Suit Gundam Wing. He also narrated the movie Mobile Suit Gundam Wing: Endless Waltz Special Edition. This body of work demonstrates a recurring collaboration with the German dubbing of productions from the Gundam franchise.

In addition to his anime roles, Grete's voice has been featured extensively in other media. He has dubbed voices for live-action television series, with credits including The King of Queens, Nash Bridges, 24, and Baywatch. His voice is also widely heard in German radio plays, with multiple credits between 2004 and 2012 for series published by Europa. Furthermore, he has lent his voice to numerous commercials, documentaries, and TV magazines.