Who are the newest brother and sister group?

As of my last knowledge update in October 2023, the newest brother and sister group making waves in the music industry is "The Chicks," formerly known as The Dixie Chicks, who have gained renewed attention with their recent releases. However, if you're referring to a specific new sibling duo that emerged after that date, I may not have that information. Please check the latest music news for the most current sibling groups.