Denise, 48, posted the set of photos on her Instagram.
"Happy 8th birthday to #MissEloise little angel face," she wrote as the caption. "Happy girl ... love her so much and always such a bright ray of light."
Fellow RHOBH castmates Kyle Richards and Lisa Rinna showed some love for the birthday girl.
Eloise is Denise's only adopted child. She shares two daughters with ex-husband Charlie Sheen.
All three were in attendance at Denise's wedding to husband Aaron Phypers in September 2018.
What are your thoughts on Aaron's gesture? Sound off in the comments!