The actor had previously shared that his mom was diagnosed with advanced cirrhosis of the liver and kidney failure.
Colton Haynes' mother, Dana, died after battling with advanced cirrhosis of the liver and kidney failure for quite some time.
The 29-year-old Teen Wolf actor shared the tragic news with a heartbreaking message posted on his Instagram on Friday night.
"Today I lost my best friend, the love of my life...my momma," Haynes expressed alongside a slideshow filled with pictures of him and his mother. "Words can't express how incredible this woman was. I have so many things to say but I'm in a state of shock. I will always love you momma. RIP my angel."
Just last month, Haynes opened up about his mother's declining health and that she was in need of a liver transplant.
"My mom, Dana, always loves to laugh. Even when her liver & kidney doctors gave us the worst news you could get, my mom looked at us and said, 'The best thing to do in these situations is to laugh.' She then chuckled so loud you could hear it to the other end of the hospital. That's my mom. Shes funny, bull headed, & strong," he wrote on Instagram at the time, adding, "she doesn't have that much time to wait."
A couple months ago, Haynes was on cloud nine after marrying Jeff Leatham in Palm Springs, California. See more in the video below.