Rachel Bilson & Hayden Christensen Kiss in Rare PDA Pic!

Rachel Bilson and Hayden Christensen lock lips in this new PDA photo posted to her Instagram account.

The 33-year-old Hart of Dixie actress captioned the photo simply with an emoji of a heart with an arrow through it.

PHOTOS: Check out the latest pics of Rachel Bilson

Rachel and Hayden are not seen together often, so we love getting this glimpse into their relationship!

Also pictured inside: Rachel stepping out in a full denim outfit at the Byron Williams Salon on Friday (July 17) in Beverly Hills, Calif.