Celebrity·Posted on May 6, 2015Reese Witherspoon Did Not Get A Joke On "David Letterman" And It Was HilariousWe all have those days.by Sheridan WatsonBuzzFeed StaffLinkFacebookPinterestTwitterMail Oscar-winning actress Reese Witherspoon appeared on the Late Show with David Letterman last night. At one point, David showed the audience a picture of Reese with her 15-year-old daughter, Ava. Tap to play GIF Tap to play GIF (Here's the picture he showed BTW). View this photo on Instagram After looking at the pic, Reese mentioned how Ava was born the same year she first appeared on Dave's show. Tap to play GIF Tap to play GIF There's silence — Dave realizes he's got a good joke on his hands. Tap to play GIF Tap to play GIF He goes in for the kill... Tap to play GIF Tap to play GIF And Reese finally figures out what's going on. Tap to play GIF Tap to play GIF Don't worry, Reese — we've all been there. Tap to play GIF Tap to play GIF Spoken like a true Elle Woods! Tap to play GIF Tap to play GIF You can watch the whole hilarious moment here. View this video on YouTube youtube.com Reese Witherspoon’s Teenage Daughter Will Make You Feel Really Old