Matthew McConaughey and Camila Alves at Heart Truth Red Dress Fashion ShowMatthew McConaughey and Camila Alves could barely keep their hands off each other backstage at the Heart Truth Red Dress fashion show. The 'Ghosts of Girlfriends Past' actor kept showering his partner with kisses all night long as she prepared to walk the runway.

"The two looked madly in love. They kept kissing and laughing all evening," a source backstage tells PopEater. "It was Camila's night to shine. Matthew proudly stood by her side and happily played the supporting role."

The pair, who have two children together, son Levi and daughter Vida, reportedly took a break to have a big evening out alone together.

Right before the show started, McConaughey took his seat in the front row next to Bill Rancic, who was there supporting wife Giuliana Rancic. As Alves flowed down the runway in a sexy, asymmetrical gown by KaufmanFranco, the actor proudly looked on, beaming with a big smile while snapping a few photos.