Sterling Beaumon portrays young Ben. He is the youngest actor ever to be credited as a guest star on Lost.

Sterling Beaumon (born June 2, 1995) is an American actor and singer. Outside of Lost, he is best known for his lead role as "Max Doyle" in the 2008 film Mostly Ghostly: Who Let the Ghosts Out?

He has also made guest appearances on television programs such as Heroes, House, Scrubs, Bones, ER, and 7th Heaven.

Wikipedia has information related to: