Zac Efron, Danny DeVito and the Hangover star Ed Helms are reportedly onboard for an as yet untitled film project.
Betty White and comedian Rob Riggle have already inked deals to join the environmental-themed movie, the Daily Express reports.
Efron will reportedly take the role of Ted, a young boy who wants to know why the world has become ugly, while DeVito will play the Dr Seuss character of The Lorax.
Former Golden Girls star White will reportedly take the part of Efron's grandmother, while Helms will provide the voice for the tree-chopping Onceler.