The provided text is an excerpt from a Wikipedia article detailing the life and career of American actor and comedian Jason Alexander. The source comprehensively covers his life, beginning with his early life and education, including his birth name, Jay Scott Greenspan, and his theatrical training at Boston University. It then chronicles his extensive career, notably his breakthrough role as George Costanza in the hit sitcom Seinfeld, alongside his work on Broadway, including his Tony Award win for Jerome Robbins' Broadway. The article also outlines his many roles in film and television, lists his numerous awards and nominations, and discusses his personal life, encompassing his marriage, charity work, and political views as a prominent supporter of the Democratic Party and the OneVoice initiative.