If there were ever any doubt that Hugh Grant’s charm is indestructible, his character’s best man speech in “Four Weddings and a Funeral” should serve as the final proof. There are only a few rules to follow when giving a wedding speech, like to avoid the word divorce and to withhold family secrets, and Grant breaks them all. Though he does so while wearing dopey glasses and sweetly stuttering, so we forgive him. Similarly, in the movie “Old School,” a drunk Luke Wilson gives a successful speech only because Vince Vaughn swoops in and saves him with Shakespeare. So, what can we, mere mortals of the real wedding world, take from all these outlandish, unrealistic Hollywood examples? Here are five tips from on-screen weddings to make your own speech Oscar-worthy: