Casey Wasserman’s eponymous sports and music management company has closed a deal to acquire the longstanding talent representation and production shop Brillstein Entertainment Partners.

Wasserman formally announced the transaction on Monday alongside Brillstein Co-CEOs Cynthia Pett and Jon Liebman. The acquisition bolsters Wasserman verticals like marketing and content creation (Brillstein produced “The Sopranos”), and also formally puts the grandson of legendary movie mogul Lew Wasserman in the Hollywood talent fold — welcoming star clients like Brad Pitt, Florence Pugh, Adam Sandler, Tiffany Haddish, Elizabeth Olsen and the newly named Lois Lane: Rachel Brosnahan.

Brillstein leaders Pett, Liebman, Marc Gurvitz and Sandy Wernick will continue to lead their company and join Wasserman’s executive leadership team. Same for partners including George Freeman, Missy Malkin, David McIlvain, Alex Murray, Andrea Pett and Tim Sarkes, as well as 30-plus managers in New York and Los Angeles. Previously known as Brillstein Grey, the...