Passage: Additionally, Josh Brolin appears, uncredited, as Thanos through voice acting and performance capture. Sean Gunn stood in for Thanos during filming and portrays Kraglin, Yondu's first mate in the Ravagers. Alexis Denisof reprises his role as Thanos's vizier, "The Other", from The Avengers. Ophelia Lovibond plays Carina, the Collector's slave; Peter Serafinowicz plays Denarian Garthan Saal, a Nova Corps officer; Gregg Henry plays Quill's grandfather; Laura Haddock plays Quill's mother, Meredith; Melia Kreiling plays Bereet; Christopher Fairbank plays The Broker; Mikaela Hoover plays Nova Prime's assistant; Marama Corlett plays a pit boss at the bar, The Boot; Emmett J. Scanlan plays a Nova riot guard; Alexis Rodney plays Moloka Dar; Tom Proctor plays Horuz, a Ravager; and Spencer Wilding plays a prison guard who confiscates Quill's Walkman. Canine actor Fred appears as Cosmo. Stephen Blackehart had a supporting role. Naomi Ryan also had a supporting role in the film, though it was cut in the final version. Cameos in the film include: James Gunn as a Sakaaran; Stan Lee as a Xandarian Ladies' Man; Lloyd Kaufman as an inmate; Nathan Fillion as the voice of an inmate; Rob Zombie as the voice of the Ravager Navigator; composer Tyler Bates as a Ravager pilot; and Seth Green as the voice of Howard the Duck.\n\nQuestion: Based on this passage, who plays thanos in guardians of the galaxy 1? Let's have some stream of consciousness first.
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The relevant information is: Additionally, Josh Brolin appears, uncredited, as Thanos through voice acting and performance capture. So, the answer is Josh Brolin.
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