American actor Robert Morse, best known for playing advertising executive Bertram "Bert" Cooper on the hit television series Mad Men, passed away at the age of 90. The acclaimed actor's son Charlie Morse informed the news of his father's demise to ABC7 on Wednesday but didn't furnish any details regarding the cause of death. According to CNN, Morse, in his career spanning over 60 years, was a seasoned theatre performer and earned two Tony Awards, including an Emmy Award. Having started performing on Broadway in the mid-1950s, the reputed actor garnered fame for creating and the portrayal of the entrepreneurial character J. Pierrepont Finch in 1961's How to Succeed in Business Without Really Trying, which fetched him a Tony Award and he later also reprised the role for the film adaptation in 1967. Morse made numerous appearances in episodes of shows like Fantasy Island to American Crime Story: The People v. O.J. Simpson, which ranged from him playing a guest star to a voice actor. 

Morse's most prominent role was on the television show, Mad Men, for which he earned several Emmy Award nominations. His quirky portrayal of the sharp-witted advertising executive Bertram "Bert" Cooper was one of the most notable aspects of the series, which ran for seven seasons, and is regarded as one among the greatest television shows of all time. Morse further carved a niche for himself as a voice actor and contributed on the vocal front for animated shows like The Legend of Korra and Teen Titans Go! to name a notable few. He also reprised his role as Santa Claus from the Teen Titans Go! television show for the big screen adaptation Teen Titans Go! vs. Teen Titans, which incidentally was his last appearance in a film.