Jonathan Gregory Brandis (April 13, 1976 – November 12, 2003) was an American actor. Beginning his career as a child model, Brandis moved on to acting in commercials and subsequently won television and film roles. Brandis made his acting debut in 1982 as Kevin Buchanan on the soap opera One Life to Live. In 1990, he portrayed Bill Denbrough in the television miniseries It. Also in 1990, he starred as Bastian Bux in The NeverEnding Story II: The Next Chapter. In 1993, at the age of 17, he was cast in the role of teen prodigy Lucas Wolenczak on the NBC series seaQuest DSV. The character was popular among teenage viewers, and Brandis regularly appeared in teen magazines. Brandis died by suicide in 2003 following a period of heavy drinking and career setbacks.
Source : Wikipedia