The Legend of Korra credits
Noatak (age 14)
- Character information: Noatak
- 111. "Skeletons in the Closet"
Selected other credits
- Batman: Under the Red Hood (2010; video)
Alexander is the younger brother of Vincent Martella, who is best known for voicing Phineas in the television series Phineas and Ferb. No additional biographical information for this voice actor has been found.