Wikipedia (Ed Wynn in television): In the late 1940s Ed Wynn hosted one of the first comedy-variety television shows, and won an Emmy Award in 1949. Buster Keaton made guest appearances with Wynn, establishing him in television as well.
After the end of Wynn's television series, his son, actor Keenan Wynn, had encouraged him to make the career change rather than retire. Ed Wynn reluctantly began a career as a dramatic actor in television and movies. The two appeared in two productions: the 1957 Playhouse 90 broadcast of Rod Serling's play Requiem for a Heavyweight. Ed was terrified of straight acting and kept goofing his lines in rehearsal. When the producers wanted to fire him, star Jack Palance said he would quit if they fired Ed. On live broadcast night, Wynn surprised everyone with his pitch-perfect performance, and his quick ad libs to cover his mistakes. Ed and his son also worked together in the Jose Ferrer film "The Great Man," Ed again proving his unexpected skills in drama.
Requiem established Wynn as serious dramatic actor who could easily hold his own with the best. His role in The Diary of Anne Frank won him an Academy Award nomination for best supporting actor in 1959.
Also in 1959, Wynn appeared on Serling's TV series The Twilight Zone in "One for the Angels". Serling, a longtime admirer, had written that episode especially for him, and Wynn later starred in the episode "Ninety Years Without Slumbering". For the rest of his life, Ed skillfully moved between comic and dramatic roles. He appeared in feature films and anthology television, endearing himself to new generations of fans.
see
http://en.wikipedia.org/wiki/Ed_Wynn for much more on this fabulous comedian.