The songstress and fashion mogul took to Instagram on Sunday to honor her cousin's memory.
Rihanna took to Instagram to share a slideshow post including several photos of herself and Alleyne, as many of Alleyne alone, smiling into the camera.
"Miss you and dat smile cuz. #Tavon" she captioned the emotional tribute.
The post comes exactly four years to the day after Alleyne was murdered in Barbados. The 21-year-old was shot by a still unidentified man several times while he was walking near his home. The shooter fled the scene, while Alleyne later succumbed to his injuries at a hospital.
Rihanna shared the tragic news on Instagram at the time, writing, "RIP cousin... can't believe it was just last night that I held you in my arms! never thought that would be the last time I felt the warmth in your body!!! Love you always man! ???❤ #endgunviolence."