Alfredo Martins is a highly accomplished Brazilian actor and voice actor, born on December 22, 1946, in Rio de Janeiro, Brazil. His career in performance began somewhat by chance in 1962 when he accompanied a friend to TV Tupi and was invited to participate in a new segment on the program Show de Sorrisos. This opportunity launched his on-screen career, during which he also worked as a radio actor for Rádio MEC. He balanced his artistic pursuits with academic ones, earning a degree in Psychology from Faculdade Santa Úrsula do Rio in 1973. Martins remained a prominent figure at TV Tupi until 1978, appearing in shows like Cassio Muniz Show and various telenovelas, before moving to TV Globo where he would go on to appear in over fifty novelas and miniseries, starting with O Astro.

Parallel to his live-action work, Alfredo Martins began his extensive career in dubbing in 1963 at the renowned Herbert Richers studio. He was among the first eleven actors to be contracted specifically as dubladores in Rio de Janeiro, working at the studio Riosom during this early period. This marked the beginning of a prolific second career, where he would become the Portuguese voice for a vast array of characters in animation and live-action.

Martins has an extensive and varied filmography in Brazilian dubbing, lending his voice to numerous anime and animated series. He is the Portuguese voice of Geo Noto Soto, the priest of Metallicana, in the Netflix anime series BASTARD!! -Heavy Metal, Dark Fantasy-. In the world of military fantasy, he voices the character Loria in the series Saga of Tanya the Evil. His work also extends to anthology projects, such as providing the voice for The Prophet in Halo Legends. Other notable anime and animation roles include Adão in In The Beginning - The Bible Stories, Peter Johanssen in Yūsei Kamen, Bob, o Gênio in a new dubbing of Hakushon Daimaō, and Hotshot in Transformers: Robots in Disguise. His range is further demonstrated by roles such as Kaiser Granvorka in Black Clover: Sword of the Wizard King, Claus Van Bogoot in Cyborg 009 The Cyborg Soldier, Dr. Sid in Final Fantasy: The Spirits Within, Paul Hanbridge in Little Witch Academia, and the Elder Zarude in Pokémon the Movie: Secrets of the Jungle.

Beyond anime, Alfredo Martins has had a long and distinguished career dubbing characters in major Western animation and live-action films. He is well-known as the voice of beloved characters like Mr. Potato Head in the Toy Story franchise, beginning with Toy Story 2 in 1999. He has also voiced characters in Disney films such as The Rescuers, A Bug's Life, The Princess and the Frog, and Aladdin. His work spans numerous other projects, including the role of Grandpa George in the Brazilian Portuguese dub of VeggieTales.

In addition to his voice work, Alfredo Martins has also contributed to the industry as a dubbing director, notably on the series Transformers: Armada. His legacy in Brazilian dubbing is deeply personal, as his dedication to the craft has inspired his children, Fabiola, Leonardo, and Ana Paula, all of whom have also become actors and voice actors.