Ritter, who died last week of a torn aorta, was scheduled to be a presenter at television's tribute to itself telecast live Sunday on Fox at 8-11 p.m. ET.
The awards show will do a special tribute to Ritter, the 54-year-old star of ABC-TV's situation comedy "8 Simple Rules for Dating My Teenage Daughter" who was best known for his role as Jack Tripper on the 1970s hit "Three's Company."
Mischer said Ritter was held in such high esteem and his death Sept. 11 was such a shock that few will not be thinking of him during the awards program, the New York Post reported.
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