"Britt Miller is exceedingly capable across the board … she has an exceptional ability to coordinate a large team working on complex tasks in tight timelines, and she has a head for business strategy and understands how the legal issues and legal strategy intersect with where we want to take the business.”

Legal 500


Britt Miller serves on Mayer Brown’s global Management Committee and co-leads the firm’s global Antitrust & Competition practice. Britt’s practice focuses on high-stakes antitrust litigation and complex commercial litigation, representing domestic and international corporations in price-fixing, market allocation, monopolization, and conspiracy cases, and has also counseled clients on general antitrust issues.

Since joining Mayer Brown in 1998, Britt has led numerous antitrust cases including some of the largest, most high-profile antitrust cases filed in the US. Her antitrust work has involved a variety of products and industries including collegiate athletics (Alston, NIL), automotive (Wire Harness), computer systems, agriculture proteins (Beef, Pork, Salmon, Turkey), insurance, synthetic rubber (EPDM, NBR), aspartame, resins, household moving services, industrial chemicals, paper products (Containerboard), financial services (CDS, GSE, IRS, SSA), fertilizers (Potash), vitamins, and technology.

Britt's litigation experience spans both the federal and state court systems and also includes client representations relating to contract disputes, constitutional rights, securities fraud, banking practices, airline deregulation, products liability and trust interpretation.

Britt is a member of the American Bar Association's Section of Antitrust Law and the Section of Litigation and has been named a BTI "Client Service All-Star." She also has been named a "Rising Star" in the Antitrust Litigation sections of the Illinois Super Lawyers list published by Law & Politics for the past six years and as a "Future Star" by Benchmark Litigation for the past six years. Britt has been recognized in Expert Guides: Women in Business Law as an expert in the field of "Competition & Antitrust" every year since 2014, and was recently recognized in Global Competition Review’s “Women in Antitrust” 2021 report, which showcases women private practitioners, enforcers, in-house counsel, economists and academics. Prior to joining Mayer Brown, Britt served as a Judicial Extern to the Honorable George M. Marovich, US District Court for the Northern District of Illinois.


  • Anglais


Auburn University, BA
Dean's List

Northwestern University School of Law, JD, cum laude
Note and Comment Editor, Northwestern Law Review; Order of the Coif, Dean's List

Inscription au Barreau


  • Illinois


  • US Supreme Court
  • US Court of Appeals for the Federal Circuit
  • US Court of Appeals for the Third Circuit
  • US Court of Appeals for the Seventh Circuit
  • US Court of Appeals for the Ninth Circuit
  • US District Court for the Northern District of Illinois
  • US District Court for the Eastern District of Michigan


  • Board of Trustees, Chicago Symphony Orchestra 
  • Fellow, Leadership Greater Chicago (2017)
  • Board Member, Rush University Medical Center Associates Board 
  • Sustaining Member & Former President, Lyric Opera of Chicago Guild Board 
  • Board Member, Chicago Botanic Garden Guild Board
  • The Chicago Network, Member
  • Economic Club of Chicago, Member