Join the Indianapolis Motor Speedway and the IZOD IndyCar Series in sending special messages to Dario Franchitti in honor of his recently announced retirement.

Dario has had a tremendous career and impact on the Indianapolis 500 and the IZOD IndyCar Series.

Let him know just how much his career has meant to you by sending him a personalized message on Twitter, Instagram or Facebook using the hashtag #ThankYouDario. All of your messages will be collected and added to a special book that will later be delivered to Dario himself!

If you don't have a Twitter, Facebook or Instagram account please type in your message below!