EXHIBIT 1.1 PSYCHIATRIC SOLUTIONS, INC. (a Delaware corporation) 3,500,000 Shares of Common Stock UNDERWRITING AGREEMENT Dated: September 14, 2005 PSYCHIATRIC SOLUTIONS, INC. (a Delaware corporation) 3,500,000 Shares of Common Stock (Par Value $0.01...Underwriting Agreement • September 16th, 2005 • Psychiatric Solutions Inc • Services-specialty outpatient facilities, nec • New York
