Katherine McNamara Had The Cutest Birthday Wish for 'Shadowhunters' Co-Star Dominic Sherwood

Happy birthday, Dominic Sherwood!

The Shadowhunters star is turning 28 today and his co-star Katherine McNamara possibly had the sweetest birthday wishes for him.

“Happy Birthday, to one of my favorites, @domsherwood,” she writes on Instagram. “Thank you for always being honest, for encouraging me to take risks, and being there when I need advice.”

Kat adds, “We’ve been a team for a while now and I’m so thrilled we are in this together. You’ve got a tireless spirit and an eye for mischief, but above all you have a heart of gold.”

So, so sweet!