David Letterman's Epic Retirement Beard Is Showing No Signs of Stopping

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David Letterman is really committed to his new look.

The 68-year-old former Late Show host turned heads when he was spotted growing out a giant beard in September, and two months later, it's still going strong. Letterman appeared at an event on Monday at his alma mater -- Ball State University in Muncie, Indiana -- to discuss filmmaking with directors Spike Jonze and Bennett Miller, where his facial hair game was even more prominent.

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WATCH: David Letterman Has Grown a Giant Beard and Is Now Barely Recognizeable

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Letterman addressed his jarring new look at the event when he joked that his epic white beard made him look more like Charles Darwin, rather than Santa Claus, the New York Timesreports.

Obviously, the funnyman has been enjoying one of the perks of his retirement -- not having to shave -- since his emotional, star-studded finale five months ago. After 33 years in late night and nearly 20,000 guests, Letterman signed off the Late Show on May 20.

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But Letterman just couldn't help himself when it came to the controversial Donald Trump, coming out of retirement in July to slam the presidential hopeful with his famous "Top 10" list.

"I am so happy to be out of the house!" he joked on stage at Martin Short and Steve Martin's A Very Stupid Conversation performance in San Antonio, Texas. "I retired and I had no regrets, none. I was happy. I was complacent. I was satisfied. I was content. And then a couple of days ago, Donald Trump said he was running for president. I have made the biggest mistake of my life, ladies and gentlemen."

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