The Mills Firm is a law firm that focuses on appellate litigation in Florida's state and federal courts. The firm represents a wide range of individuals, businesses, and organizations in civil appeals involving nearly every area of the law imaginable, although in personal injury and wrongful death cases, the firm exclusively represents the injured and their families. The firm also handles high-end criminal and family law appeals.

The firm's lawyers have argued and won in the Supreme Court of the United States, the Eleventh Circuit, the Supreme Court of Florida, and all five of Florida's district courts of appeal. Some of the state's best trial lawyers retain the firm early in the trial process to help best position the case for ultimate success on appeal, but the firm does not directly handle trial litigation. The firm is occasionally retained based on direct client inquiries, but the vast majority of the time, the firm is associated by trial counsel.

While its fees are at the top of the market, the firm also has a deep commitment to giving back to the community and the courts by handling substantial pro bono and "low bono" (reduced fee) work for those otherwise unable to afford legal representation. Due to overwhelming demand, the firm accepts such matters almost exclusively by court appointment or referral from a recognized legal aid organization. Potential clients in search of pro bono counsel should contact their local legal aid organization, instead of contacting the firm directly.