“Vada. I’m embalming my high school teacher. Don’t sing.” That line, from the trailer for My Girl (1991), was the first hint that this movie was destined to become a classic. My Girl belongs to the pre-grunge ’90s, when sincerity was still more common than irony. Yes, the film was set in the summer of 1972. But now that we’re in 2011, doesn’t 1991 feel like a more innocent time? It’s been 20 years since My Girl charmed us all into submission. Where have all the actors gone? Let’s find out.