Kyle Busch's Last Social Media Post Celebrated Son Brexton's 11th Birthday

Kyle Busch's final Instagram post before his untimely death served as a birthday message for his son Brexton.

The NASCAR driver, who was 41 years old, died on Thursday, May 21, following hospitalization for severe illness. Three days prior to his passing, Brexton had turned 11, prompting Kyle to share an emotional tribute on social media.

On May 18, Kyle posted his birthday wishes for his son, writing: "Happy Birthday Brexton!!! Your mom & I are so proud of who you're turning out to be! You're the best kid on & off the track, you amaze us every day. Keep doing what you're doing and there is no limit to what you'll accomplish! Love you buddy!"

Earlier in May, Kyle also honored the women in his family. He marked Mother's Day—which coincided with his daughter Lennix's birthday—with a celebratory post for both his wife Samantha and his mother, alongside a birthday message for Lennix.

"My girls deserve the spotlight today," he wrote. "Happy Mother's Day to Samantha and my Mom! Thank You both for the love, patience, strength, and everything you pour into our family every single day. And Happy Birthday to our crazy Lennix. You keep us laughing, keep us on our toes, and somehow make every day brighter at the same time. I'm lucky to do life with you girls. Love you all more than you know!!"