He became known for his part as Leonard Hofstadter within the CBS sitcom THE BEST Bang Theory so that as David Healy on hit sitcom Roseanne. He grew up by a relationship councilor mom and a treatment instructor dad and produced his performing debut at age group 12 in the 1987 mini-series Murder Ordained. He made an appearance as Rusty Griswold in the 1989 film Country wide Lampoon’s Christmas Holiday and, in 2011, he produced a visitor appearance on Entourage as himself. He started dating celebrity Kelli Garner in 2011, however the few break up in 2014. He dated his Big Bang Theory co-star and like curiosity, Kaley Cuoco, for just two years while on the display.