Alpha is the (former) secondary antagonist of Disney/Pixar's 2009 animated feature film Up and the main antagonist of the Up short film Dug's Special Mission. He is the leader of Charles Muntz's pack of dogs.
Add actors/actresses and cast the roles/films/series that they were rumored, considered, offered, negotiated, auditioned, turned down, and/or originally casted before getting recasted. (Please double-check in research.)
