1: Kelly Kelly - WWE SmackDown Vs RAW 2008 (20 years, 9 months and 23 days)
If Kelly Kelly were to rejoin the WWE in 2018, she would still be one of the youngest women on the roster.
At just 19, Kelly joined the WWE, first appearing on the revived ECW brand, as the innocent girlfriend of Mike Knox, as well as having her own stripteasing exhibition segments, called Kelly's Expose.
Later transitioning to a role in the ring, Kelly first appeared in SmackDown Vs RAW 2008, though it would be several years before Kelly would win championship gold.
However, in 2011, K-squared defeated Brie Bella to win the Diva's Championship, holding the title until she was defeated by future WWE Hall of Famer Beth Phoenix at the 2011 Hell In A Cell pay per view.
At just 20 years old, we can't see her record being broken by anyone in any future WWE video games.