Will Poulter on Playing ‘Infant’ Adam Warlock in 'Guardians of the Galaxy Vol. 3.' (Exclusive)

Will Poulter chats with ET's Ash Crossan about starring as Adam Warlock in 'Guardians of the Galaxy Vol. 3,' the final installment of the Marvel trilogy, in theaters May 5. The actor opens up about introducing his character as the trilogy is coming to end and what it was like working with director James Gunn. He also breaks down the process of 'getting gold' for his character and reveals who in the Marvel universe he would like to go toe-to-toe with Adam.