He would have been 44 now and preparing for the release of his new movie.
But he's been gone for three months. Actor Chadwick Bosman died in August after a battle with colon cancer and friends, fans and his family are still reeling from the loss.
His friends celebrated his 44th birthday in various ways.
In his honour, Marvel changed the opening credits on Disney Plus. The announcement was made by The Walt Disney Company CEO Bob Iger, who encouraged fans to stream the movie.
"To all fans of #BlackPanther: watch the film on #DisneyPlus late tonight, for a special tribute to someone that was and will always be near and dear to our hearts," he wrote.
See his tweet below:
Marvel also released a tribute video captioned "Long live the king. Wakanda Forever."
See the post below:
Mark Ruffalo, producer and former co-star on Black Panther shared a throwback video of Chadwick surrounded by his co-stars on the set of Avengers: Infinity War in 2017.
"Thinking of your passion, love, and your light today, @Chadwick Boseman," he wrote.
"Happy Birthday. Wishing we could time travel back to this moment."
Lupita Nyong'o, Michael B. Jordan, Kerry Washington, Jamie Foxx, Common and Jimmy Fallon were just some of the stars that wished the late actor a happy birthday.
"Deeply loved, sorely missed," Lupita wrote.
"Thinking about #ChadwickBoseman today on what would have been his 44th. I'll always be grateful to have known him," Jimmy Fallon wrote on Twitter.
Read more | These are Chadwick Bosemans's last 5 films
Chadwick will star in the upcoming American drama film 'Ma Rainey's Black Bottom' alongside Viola Davis. This was his final role to which he received a posthumous nomination for the role of Leeve. He was nominated for Best Actor by the Gotham Independent Film Award.
The film is set to release on Netflix on December 18.
"Happy birthday in Heaven Chadwick!," Viola wrote. You are still so alive to me!! I love you."
See Viola's post below: