Yes, you are always free to change attorneys and you can have any attorney you wish represent you. However, it is important to consider that changing attorneys in the middle of the divorce case will cost more money (since you are paying two attorneys), and depending on the stage of the proceeding, may directly affect the new attorney's ability to adequately represent you in the case. It is far better to choose the right attorney from the very beginning, but if a change is required, it is usually permitted by the court.