Thomas Dekker
Thomas Alexander Dekker (born December 28, 1987) is an American film and television actor and a musician. He is also a singer and has written and produced two albums. He is best known for his roles as John Connor in Terminator: The Sarah Connor Chronicles, Nick Szalinski on Honey, I Shrunk the Kids: The TV Show, and Zach on Heroes. He also did the voice of Littlefoot in The Land Before Time V-IX (singing voice in The Land Before Time V) and as Fievel Mousekewitz in An American Tail: The Treasure of Manhattan Island and An American Tail: The Mystery of the Night Monster. He is also known for playing Jesse Braun in the 2010 remake of A Nightmare on Elm Street, and recently, Smith in Gregg Araki's film Kaboom. Description above from the Wikipedia article Thomas Dekker (actor), licensed under CC-BY-SA, full list of contributors on Wikipedia
Known for
My Sister's Keeper 
Star Trek: Generations 
Terminator: The Sarah Connor Chronicles 
The Secret Circle 
Village of the Damned 
Miss Bala 
Kaboom 
Backstrom 
Laid to Rest 
From Within 
Fear Clinic 
Chromeskull: Laid to Rest 2 
The Land Before Time V: The Mysterious Island 
Plush 
Cinema Verite 
Body Brokers 
The Land Before Time VI: The Secret of Saurus Rock 
The Land Before Time VII: The Stone of Cold Fire 
Swimming with Sharks 
Jack Goes Home 
The Land Before Time IX: Journey to Big Water 
Angels Crest 
Little Dixie 
All About Evil 
An American Tail: The Treasure of Manhattan Island 
Welcome to Willits 
Enter the Dangerous Mind 
An American Tail: The Mystery of the Night Monster 
Do You Take This Man 
Lost in the White City