Demi Lovato and Wilmer Valderrama tend to keep their on-again off-again relationship under wraps, but now Demi Lovato has confirmed their relationship to the public with a recent Twitter message dedicated to boyfriend Wilmer Valderrama.

"I'm so excited for #FromDuskTillDawn - @WValderrama I couldn't be more proud of you.. This is your night!!! Congrats my love!! Besitos," Demi Lovato wrote on Twitter Tuesday night.

The 21-year-old singer gave the shoutout to her boyfriend Wilmer Valderrama, 34, to support his new show "From Dusk Till Dawn." Demi sounds like she couldn't be prouder of her man, who reached fame from his role on "That '70's Show." She actually used the words "love" and "besitos," which means kisses in Spanish!

Wilmer and Demi split in January 2012, but were spotted out together on numerous occasions in 2013, sparking rumors that they were dating again. Looks like Demi is more than ready to go public with her relationship again!

Demi also posted a photo on her Twitter account a few weeks ago, featuring Wilmer and the rest of his "From Dusk Till Dawn" co-stars, who came out to support Lovato at one of her "Neon Lights" tour concerts.

Demi Lovato posted the photo on her Twitter account with the caption, "Thank you SO much to my #FromDuskTillDawnfamily for flying to Dallas for the night to see the #NEONLIGHTSTOUR!!!"

Demi also wrote, "Best night ever.... So happy right now... Thank you Dallas, TX!!!!! I LOVE YOU!!!! #NEONLIGHTSTOUR"

The couple were also recently spotted at dinner together in Austin, Texas and showed some major PDA.

"Demi and Wilmer had dinner together at Magnolia Cafe South [Jan. 29] and they both looked incredibly happy," an eyewitness told HollywoodLife.com exclusively. "They were just so obviously into each other, holding hands at the table and smiling non-stop, especially Demi. She's been here before and is always sweet and friendly, but last night she was glowing."