In a recent interview with the NPR, actor Bill Cosby declined to respond to questions that addressed the sexual assault allegations he is currently involved in.

Cosby and his wife, Camille, appeared on the radio show to discuss their collection of African art on display at the Smithsonian Institution.

NPR Weekend Edition host Scott Simon asked Cosby about the sexual assault allegations that took place many years ago but there was no sound heard from the actor's end, according to Philly.

"This question gives me no pleasure, Mr. Cosby, but there have been serious allegations raised about you in recent days. You're shaking your head no. I'm in the news business. I have to ask the question. Do you have any response to those charges?" Simon asked.

The radio show host continued and said, "You're shaking your head no. There are people who love you who might like to hear you about this. I want to give you the chance." Still, Cosby refused to utter even just a single word.

Throughout the past couple of years, a handful of women have accused Cosby of sexually assaulting them, Boston reported.

Just last month, comedian Hannibal Buress referred to the former "Cosby Show" star as a rapist during one of his stints last month, the same publication noted.

Earlier this week, Barbara Bowman penned an essay for the Washington Post, narrating how Cosby drugged and raped her.

Meanwhile, in the midst of all the controversy surrounding Cosby, news broke out that his scheduled guest appearance on "The David Letterman Show" has been cancelled, the NY Times noted.

Cosby was initially scheduled to appear on the late night talk show on Wednesday night. When asked whether or not the cancellation of his appearance had anything to do with the sexual assault allegations, a spokeswoman for the talk show explained, "We can't comment on the booking process."