1959 – Alexander was born in Livingston, New Jersey on the 23rd of September.
1977 – Graduated from Livingston Saint High School.
1978 – Attended Boston University but stopped on his senior year after he landed a job in New York.
1981 – Married Daena E. Title on the 31st of May.
1989 – Won the 1989 Broadway Tony Award as Best Actor in the musical play entitled Jerome Robbins Broadway.
1990 – Starred in the television series, Seinfield.
1992-1993 – Won the Funniest Supporting Male Performer in a TV Series Award for his work in Seinfeld in the American Comedy Awards for two consecutive years.
1994 – Featured in the December Edition of Playboy.
1995 – Won the Screen Actors Guild Award for Outstanding Performance by a Male Actor in a Comedy Series for his role in Seinfeld.
1997 – Won the Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Comedy Series for his role in Seinfeld.
2003 – Portrayed Max Bialystock in The Producers.
2004 – He is one of the leader in the international group "One Voice".
2005 – Invited to be a celebrity judge for 2005 UCLA Spring Sing.
2006 – Signed a contract to be a regular cast-member in the second season of Everybody Hates Chris and was the host of the Comedy Central roast. On April 30th, he debuted as a professional magician.