Shaquille O'Neal is preparing for a return to the ring after accepting a challenge from Charles "Charlie Mack" Alston, best known as a longtime bodyguard for actor Will Smith. The

Shaquille O’Neal reignites decades-old feud, agreeing to face Philly icon Charlie Mack in celebrity boxing showdown.

Here is what to know about the lighthearted beef between the two giants and how they'll be settling the score.