WNBA star Te'a Cooper showered Alvin Kamara with all kinds of sweet compliments for his 27th birthday on Monday ... penning an adorable love note to the New Orleans Saints halfback on her social media page.

The former L.A. Sparks guard shared the message with a bunch of photos of the NFL star -- and included a video of their romance as well.

"@alvinkamara today Is all about you 🥺🖤," Cooper said on Monday.

"What I love most about you is your selfless heart, courageous spirit, & loyalty. I don’t just love you I respect you."

FYI, Cooper -- who previously dated NBA star Dwight Howard -- went IG official with Kamara in 2021 ... and they've been inseparable since, taking a Paris vacation together while also getting in workouts together in the gym.

"Every day we celebrate each other," the 25-year-old hooper said. "BUT TODAY IS THE DAY THE REALEST WAS BORN AND IT IS ALL ABOUT YOU! Alexa play: CATER TO YOU AND DIM THE LIGHTS."

Kamara enjoyed the bday post ... writing in the comment section, "Thank you mama. Love you ♥️"

The couple will only have a few days to celebrate -- Kamara, a five-time Pro Bowler, is heading off to Saints' training camp on July 30.