Celebrities mark Valentine's Day with sweet messages for their loved ones and their fans

Celebrities have been posting sweet messages on their social media accounts to commemorate heart's day!

Below we've compiled some of the sweetest Valentine's Day greetings celebrities posted on Instagram and Facebook.

Whether you're single or coupled up, won't you say the world could use a little more love today and every day? Happy Valentine's Day, everyone! 

— Jannielyn Ann Bigtas/LA, GMA News