No. Ramsey Solutions recommends that married couples bank together.
Money and Marriage Go Hand in Hand
When you handle money together, you do more than budget. You align your hopes, dreams, and goals. Money problems are the top issue impacting marriages. When couples agree on how to spend money, they build stronger unity. It also builds teamwork. When you get married, you become one financial unit. Your bank account should reflect that.
For a full guide, see And Two Become One: How to Combine Bank Accounts.