Felicity's interest in reading was fostered as early as 4 months old, with a systematic program developed for her when she was 9+ months old. Before her first birthday, she could recognize and know the meanings of many words, including the fourteen words which she went through in this video: clap, toes, point, open, hair, eat, kick, foot, fingers, bubble, dog, arms up, ear, wave.
Most importantly, no one had to force her (we do not believe in forcing!), and sometimes you can't drag her away from her books.
Note: When this video was taken, she did not know phonics, in that she either recognizes the word, or she doesn't. If your definition of "reading" means she must know phonics, then she doesn't know how to read. But then, that would also mean that people 'reading' languages such as Chinese do not know how to read either, because you either recognize the Chinese character(s) or you don't.
Having said that, we've found that the more a child is exposed to words (even if they are merely memorizing the words at first), they figure out the phonics rules for themselves intuitively.