Pal Maria Shriver: Jack Nicholson Is Not Retiring But RadarOnline says 76-year-old is out By John Johnson, Newser Staff Posted Sep 4, 2013 6:11 PM CDT 9 comments Comments Jack Nicholson presents the award for best picture during the Oscars in February. (Photo by Chris Pizzello/Invision/AP) (Newser) – The big man himself hasn't weighed in, but friend Maria Shriver tells E! Online that a report about Jack Nicholson retiring from acting is absolutely false. Shriver was responding to a story at RadarOnline alleging that the 76-year-old was done because of memory problems. Its source is an unnamed "Hollywood film insider." Nicholson has no such problems, says Shriver, and E! cites a source of its own who says he's currently reading scripts.