American actor born in 1931, he gained fame for his Tony Award-winning role in the Broadway production of "How to Succeed in Business Without Really Trying" and reprised the role in the 1967 film adaptation. Known for his distinctive voice and comedic timing, he also starred in "The Loved One" and "A Guide for the Married Man." Later in his career, he earned acclaim for his portrayal of Bertram Cooper on the TV series "Mad Men." His career spanned stage, film, and television, showcasing his versatile talent.