Danny DeVito

(The Lorax)

Ed Helms

(The Once-ler)

Zac Efron

(Ted)

Taylor Swift

(Audrey)

Betty White

(Grammy Norma)

Rob Riggle

(Mr. O'Hare)

Jenny Slate

(Ted's Mom)

Nasim Pedrad

(Once-ler's Mom)

Joel Swetow

(1st Marketing Guy)

Michael Beattie

(2nd Marketing Guy)

Dave Mitchell

(1st Commercial Guy)

Dempsey Pappion

(2nd Commercial Guy)

Elmarie Wendel

(Aunt Grizelda)

Danny Cooksey

(Brett/Chet)

Stephen Tobolowsky

(Uncle Ubb)

Chris Renaud

(Forest Animals)