Demi Lovato Costarring With Boyfriend Wilmer Valderrama on From Dusk Till Dawn: The Series

Wilmer Valderrama and Demi Lovato
Wilmer Valderrama and Demi Lovato  Charley Gallay/Getty Images

They're the cutest costar couple we know! Wilmer Valderrama stars as Carlos Madrigal on El Rey Network's From Dusk Till Dawn: The Series, and the actor has recruited a very special guest to join him on the Season 2 finale: girlfriend Demi Lovato!

Lovato, 22, announced the news via social media by sharing a photo of herself on the Austin set with the show's director, Robert Rodriguez. "We worked from dusk till dawn, get it? Y'all ain't ready," Lovato wrote on Instagram, without going into specifics on her character.

A photo posted by Demi Lovato (@ddlovato) on Jun 9, 2015 at 5:05am PDT

Later, Lovato enjoyed a break from filming with her boyfriend of five years, 35, who gave the singer a sweet smooch.

Lovato, who has been quite public with her prolonged struggles with an eating disorder and bipolar issues, has said That '70s Show alum Valderrama, whom she began dating when she was 17, has been her rock.

A photo posted by Demi Lovato (@ddlovato) on Jun 9, 2015 at 5:38am PDT

"I wish I could put into words how grateful I am for this man. But my love has grown to a level that words could never possibly express how much this man completes me," Lovato Instagrammed in March when marking her three years of sobriety. "He's loved me the way I never thought I deserved to be loved and . . . he still never takes credit and I want the world to know how incredible his soul is. I really wouldn't be alive today without him."

From Dusk Till Dawn: The Series returns to El Rey on Tuesday, Aug. 25 at 9 p.m. ET.

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