Wanna learn more about Juneteenth?
Leave it to former Dallas Cowboys defensive end Greg Ellis ... who wrote and stars in a play about the holiday!
Ellis -- who spent 11 seasons with the Cowboys -- is now fully immersed in the theater world ... where he writes, produces and acts.
In fact, he created "Juneteenth The Stage Play" back in 2018 ... and has an upcoming performance this weekend.
44-year-old Ellis told CBS 11 in Dallas the focus on the play is to inform the audience about the history of Juneteenth in an entertaining way.