Hillary A. Hamilton represents a wide variety of clients in commercial litigation disputes in federal and state courts across the nation. Ms. Hamilton has extensive experience in complex litigation matters, particularly in consumer class actions.

Her representations include a diverse number of high-profile disputes:

  • international cosmetics company targeted by several California consumer class actions regarding alleged misrepresentations as to the efficacy of certain anti-aging products;
  • biopharmaceutical company and an officer/director named in securities class actions and derivative actions in California and Oregon federal and state courts;
  • premium clothing manufacturer in a consumer class action arising from alleged misrepresentations regarding the country of origin in product labeling;
  • The National Basketball Association, assisting in motion practice in actions brought by former Clippers’ owner Donald Sterling in California state and federal court;
  • chain of assisted living communities, defending a class action asserting claims of violations of California consumer protection laws and financial elder abuse;
  • Red Bull, as a defendant in multiple putative class actions pending across the country challenging the nature and content of advertising statements regarding the benefits of Red Bull energy drinks;
  • Toyota Motor Corporation and Toyota Motor Sales, U.S.A., Inc. in the “economic loss” phase of the multidistrict class action litigation pending in the U.S. District Court for the Central District of California challenging alleged defects in Toyota’s electronic throttle control system, and in “bellwether” trials against Toyota in California Superior Court by individuals who allegedly suffered personal injuries due to the purported defects;
  • Christie’s, Inc., in obtaining the dismissal of a putative nationwide class action in the U.S. District Court for the Central District of California, by convincing the court to hold that the California Resale Royalties Act was unconstitutional. Ms. Hamilton was a key contributor to briefing before the Ninth Circuit, including en banc briefing regarding the interpretation of Ninth Circuit commerce clause precedent;
  • MGA Entertainment, Inc., in both the Central District of California and the Ninth Circuit, in the “Barbie v. Bratz” trials versus Mattel, Inc. over the rights to the “Bratz” doll franchise. Ms. Hamilton continues to advise MGA in its ongoing battle over Mattel’s theft of MGA trade secrets in the Los Angeles Superior Court; and
  • MGA Entertainment, Inc., in both the Southern District of New York and the Second Circuit, in defense of a copyright claim relating to the “Bratz” doll franchise.



  • J.D., University of Virginia School of Law, 2001 (Executive Editor, Virginia Journal of Social Policy and The Law)
  • M.A., University of Southern California, 1997
  • B.A., Middlebury College, 1995


  • California
  • Vermont

Hillary A. Hamilton