Dunham was inspired to create Walter when he watched Bette Davis ' final appearance on The Tonight Show Starring Johnny Carson , giving her honest , unfiltered candor to Walter , and patterning Walter 's frown on Dunham 's own .
Dunham was inspired to create Walter when he watched Bette Davis ' final appearance on The Tonight Show with Johnny Carson , giving her honest , unfiltered candor to Walter , and patterning Walter 's frown on Dunham 's own .