There are different approaches, but here is what we do and what I recommend. Now that you are officially a married couple, open a joint bank account, and eliminate your individual accounts. There are several reasons for this.
Having a joint account promotes unity and teamwork. When you only have a joint account, you do not have "your income" and "her income," or "your expenses" and "her expenses." You work together in everything. You discuss your goals and set your household budget together. If one of you makes more money than the other, that person is no longer "worth more," because your incomes are pooled together. If one person with a higher income has more in their account than the other person does, it can lead to envy, which you do not want in your marriage.
Having a joint account is more efficient and makes more sense. With separate accounts, who pays the rent/mortgage? Who pays the utilities, or buys the food? If you have separate accounts, it takes a lot of work to worry about what is "fair" when deciding how to divide up the expenses. With a single household budget and a joint account, you decide together what the household expenses are, and they get paid from one account. If one of you has debt, you both have debt. You work together to get it paid off and strengthen your financial situation in the process.
Having a joint account forces you to discuss your finances together. Working toward common financial goals together is crucial in a strong marriage, but if you maintain your separate accounts, you might be tempted to put off these discussions until you are forced to by life circumstances. It is better to work together from the start, and joining your finances facilitates that.
You are intending your marriage to last. Live your financial life like you believe that you are a team for life. If you live in a community property state, separate accounts are a fiction anyway; everything is treated as if it was pooled together in the event of a divorce.
I understand that if you are used to having your own money, it can be difficult to give up that sole control over your income, but in my opinion, it is worth it. You will certainly hear of examples from couples who maintain separate accounts and make it work. In my humble opinion, combining your finances completely is easier to do right.