Chloe Grace Moretz has written an emotional tribute to her family dog Fuller following his death.

The 20-year-old shared a picture of the canine on Instagram and told her followers he had passed away suddenly.

"Rest In Peace my dear dear Fuller I love you more than you know," she wrote. "You've been my protector and best friend since I was a little girl and I wish the end didn't come so abruptly but I know you're at peace now. I love you I love you I love you you will forever be missed."

She later shared a close-up black and white snap of Fuller's head resting on a tiled floor besides a foot and she revealed it was the last photo she had ever taken of her "little boy".

"I love you endlessly. I miss the warmth you brought to our home and our hearts," she continued. "Not a day will pass that I won't think of you and thank you for the joy you gave us. Rest In Peace my love."

The Kick-Ass actress is a huge fan of dogs and has been spotted out and about with, or shared pictures of, at least five different pooches - including Missy, Bella and Pearl - in recent years.