The Associated Press

Days after the presidential pardon of Jack Johnson, Sylvester Stallone has announced plans for a biopic on the first African-American heavyweight champion.

Stallone said May 30 that his newly launched Balboa Productions will start with a film about Johnson. The following day, Stallone stood next to President Donald Trump in the Oval Office as he signed a rare posthumous pardon to Johnson, who served 10 months in prison in what Trump called โ€œa racially-motivated injustice.โ€

In this 1932 file photo, boxer Jack Johnson, the first black world heavyweight champion, poses in New York City. (AP Photo/File)

Trump has said Stallone was instrumental in bringing Johnsonโ€™s story to his attention.

Stalloneโ€™s production company said the film will be fast-tracked with Metro Goldwyn Mayer Pictures.

Stallone has said Johnson was the basis for the character Apollo Creed in the โ€œRockyโ€ films. The 71-year-old actor is currently in production on โ€œCreed IIโ€ with MGM.