This is a Stock Phrase said by a character upon discovering an important new piece of information about another. There may have been an actual buildup of the first character's suspicions, or it may be a case of hindsight being 20/20. Common variants are "I knew there was something fishy/odd about you" or "I knew there was something about you that I liked/didn't like". When the fandom says this about a character, it's I Knew It!. Examples of I Knew There Was Something About You include: