Paul Michael Glaser and Robin Williams -- Livin' The Scruff Life

Here's 70-year-old "Starsky and Hutch" actor Paul Michael Glaser donning a silver beard and shut-in inspired swag in London this week (left) -- while 62-year-old "Mork and Mindy" actor Robin Williams was photographed in New York City with the same fuzzy look back in 2011 (right).

Nanu-nanu!