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Demi Lovato

Wilmer Valderrama Professes Love for Demi Lovato on Instagram: “Love You Through All” (VIDEO)

Wilmer Valderrama knows he's in the presence of a Demi-goddess. The That '70s Show alum, 34, wrote a heartfelt and loving birthday message for girlfriend Demi Lovato on August 21.

"Wishing you [a] happy birthday would never come close to all the inspiring things I wish for your life," Wilmer wrote to his pop star GF. "We laugh our asses off… while we do all we can do to better everything around us. Love you through all."

The Instagram photo shows the two of them cuddling and laughing while wearing matching penguin-and-snowman onesies.

Wilmer and Demi first started seeing each other in 2010 but split up shortly thereafter. But they never seemed to spend much time apart in the ensuing years, and they seemed to be back "on" in 2013.

In recent months, Wilmer appeared in her "Really Don't Care" lyric video, and she defended his honor against the critiques of an online pundit.

Since That '70s Show went off the air in 2006, Wilmer held a supporting role in the NBC drama Awake for its only season and voiced the lead character in the Disney Channel series Handy Manny for five years. These days, he stars as drug lord Carlos Madrigal the El Rey's vampire series From Dusk to Dawn.

Gotta hand it to the actor: Dude knows how to be romantic!