The comedy project was cast-contingent until Sieber signed on to the project. NBC Universal TV and Conaco Productions (with executive producers Conan O'Brien, David Kissinger and Jeff Ross) are developing the work from creators David Israel and Jim O'Doherty ("The Tracy Morgan Show"). "Wildlife" is billed as "a workplace comedy set in a wildlife animal park." Sieber will take on the role of head zookeeper, described as "a remarkably eccentric and egomaniacal character."
Sieber got his Tony nod for creating the role of Sir Dennis Galahad (as well as The Black Knight and Prince Herbert's Father) in the Tony-winning musical Monty Python's Spamalot on Broadway. The actor previously seen on the ABC comedy "It's All Relative" has also appeared onstage in Into the Woods, Thoroughly Modern Millie, Triumph of Love, Chicago and Beauty and the Beast.