Add Duolingo to the readme (#1441)

diff --git a/README.md b/README.md
index cae096e..b02f856 100644
--- a/README.md
+++ b/README.md
@@ -8,9 +8,16 @@
 
 For the first time, designers can create **and ship** beautiful animations without an engineer painstakingly recreating it by hand. They say a picture is worth 1,000 words so here are 13,000:
 
+# Sponsors
+Lottie is maintained and improved on nights and weekends. If you use Lottie in your app, please consider sponsoring it to help ensure that we can continue to improve the project we love.
+Click the sponsor button above to learn more
 
+<img src="gifs/Sponsor.png" alt="Sponsor Button" width="100"/>
 
-# View documentation, FAQ, help, examples, and more at [airbnb.io/lottie](http://airbnb.io/lottie/)
+## Lead Sponsors
+<img src="gifs/Duolingo.svg" alt="Duolingo" width="200"/>
+
+## View documentation, FAQ, help, examples, and more at [airbnb.io/lottie](http://airbnb.io/lottie/)
 
 
 
diff --git a/gifs/Duolingo.svg b/gifs/Duolingo.svg
new file mode 100644
index 0000000..9384e42
--- /dev/null
+++ b/gifs/Duolingo.svg
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 23.0.3, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 283.4 66.4" style="enable-background:new 0 0 283.4 66.4;" xml:space="preserve">
+<style type="text/css">
+	.st0{fill:#777777;}
+</style>
+<path class="st0" d="M246.2,33.2c0-10.5,8-17.9,18.6-17.9c10.6,0,18.6,7.4,18.6,17.9c0,10.3-8,17.9-18.6,17.9
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+</svg>
diff --git a/gifs/Sponsor.png b/gifs/Sponsor.png
new file mode 100644
index 0000000..9ed787f
--- /dev/null
+++ b/gifs/Sponsor.png
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