Harvey Specter, J.D.  (portrayed by Gabriel Macht) is a former corporate attorney, one of the name partners at Specter Litt Wheeler Williams, the managing partner of Specter Litt, and a former Assistant District Attorney for the New York County District Attorney's Office. He is also the husband of Donna Paulsen.

Michael "Mike" Ross (portrayed by Patrick J. Adams) is a former lawyer and junior partner at Specter Litt, a former legal consultant/supervisor at the Eastside Legal Clinic, with whom he had a legal partnership with, and a former investment banker at Sidwell Investment Group. He is married to Rachel Zane.

Donna Paulsen (portrayed by Sarah Rafferty) is the former Chief Operating Officer of Specter Litt Wheeler Williams and the wife of Harvey Specter, having originally worked as his legal secretary for over twelve years. She briefly left him to work for Louis Litt; however, Louis let  her go so that she could go back to work for Harvey. 

Rachel Zane, J.D. (portrayed by Meghan Markle) is an attorney and former associate and paralegal at Specter Litt, the daughter of Robert Zane and the wife of Mike Ross.

Jessica Pearson, J.D. (portrayed by Gina Torres) is the former managing partner of Pearson Specter Litt and current aide to the mayor of Chicago. She began to her legal career after being hired by Charles Van Dyke, one of the three name partners at Gordon Schmidt Van Dyke. She made her way up the firm's ranks and, after becoming a senior partner, conspired with Daniel Hardman to oust and restructure the firm as Pearson Hardman, with Hardman taking over the reins as managing partner.

Louis Litt, M.B.A., J.D., Esq. (portrayed by Rick Hoffman) is a corporate attorney and the managing and name partner. He was promoted to the position of senior partner at Pearson Hardman by Daniel Hardman. After discovering that Mike was a fraud, he used that information to making him a name partner, thus forming Pearson Specter Litt.

Dana J. Scott, J.D. "Scottie" (portrayed by Abigail Spencer) is a name partner at her current law firm, a former senior partner at Pearson Specter and Harvey Specter's ex-girlfriend.

Katrina Bennett is a corporate attorney and a name partner at Litt Wheeler Williams Bennett. Initially an Assistant District Attorney, she wished to jump into corporate law like Harvey Specter and agreed to help him on a case provided he hire her as a senior associate at Pearson Hardman, where she became Louis Litt's go-to associate.

Daniel Hardman, J.D. (portrayed by David Costabile) was the co-founder of Pearson Hardman. He is an attorney and was the former managing partner. His actions on the later half of season 2, forced Jessica to merge with Edward Darby to create Pearson Darby, which later got renamed to Pearson Darby Specter.

Sean Cahill (portrayed by Neal McDonough) is a prosecutor for the U.S. Securities and Exchange Commission. Initially targeting Pearson Specter. Sean became one of Harvey and Mike's trusted allies and worked with them to incarcerate a billionaire and was responsible for having Mike shorter sentence from prison.

Jeff Malone, J.D. is the boyfriend of Jessica Pearson. Formerly from the U.S. Securities and Exchange Commission, Malone transferred to Pearson Specter and became a senior partner at the firm, although he resigned a few months later.

Charles Forstman is a billionaire with a bad reputation of being a shady and manipulative banker.