Summer and autumn are popular times for weddings , and these celebrations can stir up a lot of drama. "Weddings, in a lot of ways, bring out the worst in people," said Sherry Kuehl, an advice columnist with The Kansas City Star . "It's a lot of money," said Kuehl, who receives many questions about weddings.

"It's high pressure with tonnes of decisions to make." READ MORE: Meghan opens up about past 'trauma', mental health struggles The biggest mistakes Kuehl has seen? It's when people don't think ahead and communicate before the big day. Whether you are the couple, their parents, relatives, close friends or guests, here is what experts want you to know to ensure a successful wedding.

And some people offered examples of when things went wrong at their weddings, though they wanted to remain anonymous to avoid family conflict. Like it or not, those attending a wedding have expectations — maybe it's about how big a part they will play, what traditions will be observed, who is invited or what they will wear, Kuehl said. Instead of assuming everyone is on the same page, get those involved in putting on the wedding together and have a respectful conversation ahead of time, said Lizzie Post, copresident of the Emily Post Institute and coauthor of Emily Post's Etiquette: Centennial Edition .

READ MORE: Kate's summer plans confirmed as cancer treatment continues The wedding couple or whoever is involved in putting the event together can initiate this talk, she said. "If they're sprea.