AnnaLynne McCord covers up with a bright orange dress while at the beach with boyfriend Dominic Purcell in Los Angeles on Monday afternoon (August 27).

Entertainment Weekly just announced that Denise Richards will be heading to 90210 for the 100th episode.

Denise will play Gwen, “a sexy West Beverly High School Alum turned wealthy socialite, and is the head of a very exclusive women’s club filled with powerful women. There is nothing Naomi (McCord) wouldn’t do to become a member of this club, until she realizes it’s really a grown up version of a Mean Girls clique from high school.”

90210 returns to the CW on October 8th.

FYI: AnnaLynne is wearing a Theodora & Callum scarf.