Demi Lovato took Wilmer Valderrama to a wolf sanctuary for his birthday.

Wilmer Valderrama (c) Instagram

Wilmer Valderrama (c) Instagram

The couple enjoyed an "unbelievable" visit to Wolf Mountain sanctuary in Lucerne Valley, California, yesterday (30.01.16) to mark the actor turning 36 but admitted they wished they could stay longer.

Alongside a picture of one of the animals, Demi, 23, wrote on Instagram: "Spent the day at Wolf Mountain sanctuary ... It was unbelievable. I fell in love with the wolves there and wish I could spend more time with these beautiful, spiritual creatures."

On a picture of the 'Minority Report' actor kneeling alongside a wolf, she wrote: "Look at how handsome the birthday boy is... #wolfpack #happybirthdaywilmer (sic)"

Aside from sharing a number of pictures of their day out, the 'Confident' singer also used her Instagram account to wish a happy birthday to her "incredible, loving, funny and inspiring" boyfriend.

She posted: "This beautiful man turned 36 today. I thank God every single day that this man came into my life for so many reasons.

"But mainly because I'm so blessed to not only have been able to meet such an incredible, loving, funny and inspiring soul, but even more blessed and honored to call him mine. I love you My Wilmer. You deserve the world and more ... Here's to so many more memories Feliz Cupleanos. (sic)"