Dove Cameron & Thomas Doherty's Castmates Saw Their Romantic Chemistry on Set (Exclusive)

Dove Cameron can’t help but gush over her boyfriend, Thomas Doherty.

The 21-year-old actress met her beau on set of their Disney Channel movie Descendants 2 and she can’t help but smile whenever his name is brought up in our recent sit-down interview with her.

PHOTOS: Check out the latest pics of Dove Cameron

Funny enough, Dove and Thomas didn’t realize they were falling in love during filming – but the rest of the cast noticed!

“They knew we were going to date before we knew,” Dove told JustJaredJr.com.” We were really trying not to see [the chemistry]. We’re like, ‘There’s nothing.’ And everyone was like, ‘Shut up. Date.’”

Dove‘s phone background is a sweet photo of the two, which she doesn’t necessarily hide, but doesn’t show me until we talk about their relationship.

“We didn’t get it until we were like, ‘I’m in love with you!’ We couldn’t stop it. It was amazing,” she added.

Catch the lovebirds in Descendants 2, airing July 21 on Disney Channel.

- Reporting by Sharon Tharp (@sharontharp)