If there's a Top 10 list for shaggy beards, David Letterman's might be No. 1.
The former "Late Show" host was spotted sporting untamed facial hair Sunday while walking with his 11-year-old son, Harry, on the streets of New York City.
About a month after wrapping his 33-year stint as a late-night host on NBC and CBS, the auto-racing fanatic attended the Indianapolis 500, where the 68-year-old was seen wearing a few whiskers that may have grown into Sunday's big beard.
It's unclear if Letterman's new beard will co-star in his next project: the second season of "Years of Living Dangerously," whose celebrity guests investigate the effects of climate change. The Emmy Award-winning docuseries shifts from Showtime to National Geographic for Season 2, and, according to Variety, will feature appearances by Letterman, Jack Black, Olivia Munn and "Saturday Night Live" star Cecily Strong, among others.
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