Posted 14 minutes agoDavid Letterman Revealed The Celebrity He's Been Mistaken For, And It's Cracking Me UpDavid says he was confused for the person "just the other day" at the farmers market.by Chelsea StewartBuzzFeed StaffFacebookPinterestLink Quick - who is this? Slaven Vlasic / Getty Images And who is this? Randy Holmes / Getty Images If you guessed David Letterman and Dick Van Dyke, congratulations - you know your stuff. If you didn't, count yourself among the people who have confused the former talk show host for the soon-to-be 100-year-old icon. Arturo Holmes / Getty Images, Rodin Eckenroth / Getty Images David, 78, talked about the mix-up on Wednesday's episode of Jimmy Kimmel Live. "Here's what happens to me now," he began. "People used to know who I am, and now I have to wear a name tag to get anything going." Randy Holmes / Getty Images He said he even had a case "just the other day" when he was confused for Dick at the farmer's market. Monica Schipper / Getty Images David said, "A guy comes up to me and he says, 'Excuse me, are you who I think you are?' And now, I'm all loaded up, and I respond, 'Well, that depends on who you think I are.' That always gets a big laugh." Theo Wargo / Getty Images David explained that he then asked the man to guess his identity - which he wound up getting wrong. "I said, 'Who do you think I am?' He said, 'Dick Van Dyke,' and I said, 'No! What is - no!!'" Randy Holmes / Getty Images He added that it's all part of the reality of not being in the spotlight as much since leaving his late-night television show. Slaven Vlasic / Getty Images "Because when I was your age, people my age and younger would come up to me and say, 'We watch the show every night, we love it.' And then when I left, 'We miss you.' Then it would be, 'My mother watches you now every night, and she really misses you now that we're gone.'" David joked, "And, here, lately, it's, 'I'd like a picture of you to show to my grandfather - and his father also.'" You can watch the episode here: View this video on YouTube Jimmy Kimmel Live / Via youtube.com And just so we're clear: This is David. Michael Loccisano / Getty Images And this is Dick. Cbs Photo Archive / Getty Images Got it? Great. Bye!