Actress joins AnnaLynne McCord and Dustin Milligan

The "Beverly Hills, 90210" spinoff has cast its first adult role.

Former "Full House" actress Lori Loughlin will join the cast of the upcoming CW drama, reports People.

Loughlin will play Celia Mills, the wife of Beverly Hills High's new principal and mother to Annie, a role that Hilary Duff was approached to play.

She'll join the already cast Dustin Milligan and "Nip/Tuck's" AnnaLynne McCord.

Loughlin, 43, also starred in the short-lived "Summerland" and adds her voice to the cast of the game "Grand Theft Auto IV."