"Missing You today Monty My Best Friend, I love you with all my heart & soul," Richards captioned a photo of herself with her late ex-spouse.
"I cherish each & every memory we shared," she added. "I am definitely the most blessed girl in world to have had you in my life! I still feel your Love, Strength & Courage from above. Thank you for choosing me I love you always & forever."
Brinson, who was married to Richards from 1985 to 1988 and shares 30-year-old daughter Brooke Brinson with the star, died at age 58 in January 2016 after a battle with cancer.
Richards previously paid tribute to Brinson the day after his death.
"Monty was an amazing person with an amazing soul," she said at the time. "We shared over 30 years of love & happiness and brought a beautiful daughter into world."
"I am so grateful for all that we shared," the star added. "I love you Monty, my angel in heaven, and I know that we be together again one day. I will carry you in my heart always my love. Until then, may you rest in peace."
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