The 51-year-old actress shared a snap of her mom seated next to a delectable birthday cake, along with a sweet dedication to the woman she affectionately calls her "rock."
"This woman came into the world May 4,1943," Davis wrote. "Of course, I am convinced that the universe shifted that day. I am also convinced that anyone, who has had the honor of meeting her, feels the same way."
"Happy 74 years of life mama," she added. "My love. My joy. My frustration. My rock. Love, love you with every fiber of my being. I thank God for you!"
Davis clearly doesn't mind gushing over her adorable mom. In February, the Fences star revealed a touching mother-daughter moment that they shared while she was getting ready for this year's Academy Awards
"My mom was at the house and she cried," Davis told ET’s Kevin Frazier and Nancy O'Dell ahead of winning the Oscar for Best Supporting Actress. "She just told me how much she loved me and then she cried, which is unusual for her."