Love is in the air — and on social media!

Celebrities took to Instagram today to share sweet messages in celebration of Valentine's Day 2017 — including Reese Witherspoon's adorable photo with her husband and Bindi Irwin's heartfelt tribute to her boyfriend.

MORE: See the Cutest Celebrity Couples on Instagram!

Scroll through the gallery below to see some of the cutest celebrity V-Day tributes!