Bryant, considered to be one of the greatest basketball players in the game’s history, died in a helicopter crash in California on Sunday.
He was flying with his 13-year-old daughter Gianna, who also died.
Taking to his social media page, LeBron added a bunch of photos of him and Bryant over the years as well as a screenshot of a social media post that Kobe had written just before his death.
LeBron wrote on Instagram:
“I’m Not Ready but here I go. Man I sitting here trying to write something for this post but every time I try I begin crying again just thinking about you, niece Gigi and the friendship/bond/brotherhood we had!
“I literally just heard your voice Sunday morning before I left Philly to head back to LA. Didn’t think for one bit in a million years that would be the last conversation we’d have. WTF!!
“I’m heartbroken and devastated my brother!!
“Man I love you big bro. My heart goes to Vanessa and the kids. I promise you I’ll continue your legacy man!
“You mean so much to us all here especially #LakerNation and it’s my responsibility to put this s**t on my back and keep it going!! Please give me the strength from the heavens above and watch over me!
“I got US here! There’s so much more I want to say but just can’t right now because I can’t get through it! Until we meet again my brother!!”