Scarlett Johansson won't go on Twitter because she wants to keep her personal life private.
The 27-year-old actress is determined to keep certain things in her life secret from the public and has made a decision to avoid social media sites to maintain her stance.
Speaking to Huffington Post founder Arianna Huffington for Interview magazine, she said: "I don't have a Facebook or a Twitter account, and I don't know how I feel about this idea of, 'Now, I'm eating dinner, and I want everyone to know that I'm having dinner at this time,' or 'I just mailed a letter and dropped off my kids.'
"That, to me, is a very strange phenomenon. I can't think of anything I'd rather do less than have to continuously share details of my everyday life."
Scarlett - who is divorced from Ryan Reynolds - is shocked by how many of her acting contemporaries choose to share so much of their lives via social media.