Megan Jessica Parker (born July 21, 1994) is the younger sister of Drake and the younger step-sister of Josh and one of the main characters of Drake & Josh. She is essentially the main antagonist of the series.
Megan is a cruel girl who never gets tired of pranking her brothers. However, she is shown to be a good student, good friend and also helps other people sometimes.
She also acts innocently for her mother and stepfather, and thus they think she is completely sweet and don't believe her brothers when they tell them what she does. She acts like a five year old cause she doesn't know how to act her age!
She was portrayed by Miranda Cosgrove.