"Just after she got engaged, my daughter asked me how much it costs to get married. I told her I wasn't sure - we're still paying for ours!"
If you are the Father of the Bride, then you will already have many responsibilities for your daughter’s upcoming wedding. These responsibilities might include walking her down the aisle and dancing with her at the wedding reception. You might even be helping to pay for the wedding.
At the same time, you might want to do even more. If you feel inclined to give a speech, then it is something that everyone will appreciate, especially the bride. When you give a speech that is straight from the heart, you cannot go wrong.