Name: Elvis
Cast: Austin Butler, Helen Thomson, Richard Roxburgh, Kelvin Harrison Jr., Kodi Smit-McPhee

Screen Rant

Did Tom Hanks Gain Weight for Elvis? How He Transformed Into Col. Tom Parker

Considering Tom Hanks' history of transformations, his portrayal of Col. Parker in Elvis raised questions about the nature of his metamorphosis.

Tom Hanks underwent an extreme physical transformation for his role as Colonel Tom Parker in Elvis, including wearing a fatsuit and prosthetics to change his appearance.
Due to his age and health condition, Hanks couldn't undergo extreme diets or weight changes, so his appearance in the film was entirely achieved through makeup and special effects.
In addition to his physical appearance, Hanks also focused on portraying Colonel Parker's distinct accent, which was a crucial aspect of the character's portrayal and added to the negative aura surrounding him.