David Krumholtz and Vanessa Britting by Jesse Grant/ WireImage.com
On TV, he's all about the mathematics, but in real life he's none too shabby with chemistry.
is engaged to actress Vanessa Britting, the
star's rep confirms for TVGuide.com.
TVGuide.com celebrity blogger
) and Britting, who have been dating for three-and-a-half years, are due to tie the knot sometime in 2009. -