They play love interests on screen.

And it sure seems Supergirl stars Melissa Benoist and Chris Wood are close, as the 28-year-old actress was spotted walking her hunky co-star's dog Drift, as well as her own pooch, Farley, in Vancouver, Canada on Sunday.

Dressed comfortably in grey sweatpants, sheepskin boots and a dark green parka with fur-trimmed hood, the makeup-free star was seen chatting on her phone as she walked her rumored boyfriend's large black dog and her own smaller one.

Heroine's best friend: Supergirl actress Melissa Benoist was spotted walking her co-star and rumored boyfriend, Chris Wood's dog on Sunday

In Supergirl, Melissa plays the titular heroine while Chris plays Mon El, who eventually forms a romantic relationship with the star of the show.

Their real-life love lives have also played out in the public eye.

In early January, it was reported the 28-year-old had split from his girlfriend and former Containment co-star, Hanna Mangan-Lawrence, 26.

Meanwhile, Melissa filed for divorce from her husband of just under two years, Glee star Blake Jenner, 24, in late December.

Walking and talking: The actress was seen chatting on her phone as she walked Chris' dog, Drift, and her own pet, Farley

Co-stars! In Supergirl, Melissa plays the titular heroine while Chris plays Mon El, who eventually forms a romantic relationship with the star of the show

Protective: 'She's a guardian angel. I'm like 99.9999999% sure,' the 28-year-old captioned this photo of herself and her dog, Farley

The co-stars are obviously dog people as well, and have shared photos of themselves with their best friend by their side.

'Man's best friend, indeed,' Chris captioned one photo of his adorable pooch. 'I am obsessed with this little guy.'

And in 2015 Melissa shared a photo of herself nose-to-nose with her dog.

'he's a guardian angel. I'm like 99.9999999% sure,' she captioned the image.

Supergirl is currently in it's seventh season.