10 youngest WWE stars in the company today 

#4 Dominik Mysterio - 23 years old

Dominik Mysterio isn't a stranger to WWE TV since he was part of a feud between his father Rey Mysterio and Eddie Guerrero back in 2005 when he was just eight years old. 15 years later, Mysterio has followed in his father's footsteps to become a WWE legend and is now the youngest active wrestler on the company's main roster.

As part of the recent 2020 WWE Draft, Dominik was drafted over to SmackDown along with his father and Seth Rollins, so the current feud is expected to continue for the foreseeable future.

---

#3 Austin Theory - 23 years old

Interestingly, Austin Theory was once the youngest star on WWE's main roster after being brought up to RAW by Zelina Vega. He was later recruited by Seth Rollins. Theory then became one of The Monday Night Messiah's Disciples, before disappearing from WWE TV earlier this year.

Theory has since resurfaced in NXT and looks as though he is set to remain as part of the Wednesday night show for the time being. At just 23 years of age, Theory has a bright future ahead of him and plenty of time to climb back up to the main roster.