"On The End Of A Rope.."

Taylor Swift, Danny Devito, Zac Efron, Ed Helms, Rob Riggle and Betty White have signed on to the CG adaptation of Dr. Seuss' "The Lorax" says The Hollywood Reporter.

The story follows a boy (Efron) who searches for a way to win the affection of the girl of his dreams (Swift). He comes across the story of the Lorax, the grumpy yet charming creature (DeVito) who fights to protect his world.

Helms voices Once-ler, a character whom only shows his arms and hands in the book. Riggle plays a greedy entrepreneur while White will voice the boy's wise grandmother.

Rob Riggle co stars.

The team behind "Despicable Me" including director Chris Renaud and writers Cinco Paul & Ken Daurio are  doing this pic.

A March 2, 2012.release is planned