The 23-year-old 'Harry Potter' star said she relaxed in her apartment for some days after filming 'Noah', reported E!Online.
"I was so physically and emotionally exhausted by just the process of making the film. I just didn't leave my apartment for a few weeks, walked around in my pyjamas for a few days in a row. I just needed some time to sort of put myself back together a bit," Emma Watson said.
The British actress said the film had a huge impact on the way she views the world and made her want to give back more.
"You see the movie and you go, 'Wow, we are entrusted with this beautiful world,' and it kind of makes you want to make more of an effort and give back instead of take," Emma Watson said.