Emma Watson and Johnny Simmons out to eat in Manhattan (September 9).

“Sometimes I feel as though everyone’s waiting with baited breath for the three of us from Harry Potter to do something that will perpetuate the child-star stereotype,” she told the November edition of UK magazine Elle. “I don’t know if I’m the least likely person to go off the rails, but I don’t see any need to. It’s not on my agenda. There are too many other things I want to do.”

“I’d never do a celebrity endorsement. Lancôme was taken aback sejak how much input I wanted to have,” she told the November edition of UK magazine Elle. “But I would never just put my name...