On-hold is much more exciting than it sounds. So, you were asked to go for a casting and now they want to put you “on-hold”. If you accept, it means that you must reserve the days for the shoot in your calendar. This is usually only done in the final stages where you might be one of two or three people they are looking at for the role. There might be a final decision yet to be made around dates or someone else who needs to approve the choice, but it is really good news if you are on hold.