<P> Joanna Garcia portrays Bree Buckley in the first four episodes of season three . Her and Nate 's families are rivals and they begin a `` Romeo and Juliet '' kind of relationship . When she finds out that her cousin is left at the altar at her wedding to Carter Baizen , she tries to get revenge on him for her family , which leads to her and Nate 's break - up . Olivia Burke is portrayed by Hilary Duff in season three . She is a famous movie star that starts a relationship with Dan . They break up when she realizes Dan has feelings for Vanessa . Deanna Russo portrays K.C. Cunningham , Olivia Burke 's publicist and Serena 's former boss , in season three and for one episode in season four . Laura Harring portrays Elizabeth Fisher in season three . She 's Chuck 's mother , who was thought to have died when giving birth to Chuck . She reveals to Chuck that she left when he was born , because she was nineteen and had no intentions of marrying Bart . Bart later paid her to stay away from their son . She also dated Chuck 's uncle Jack in the past , who she gave Chuck 's company to after he had given it to her . Sherri Saum portrays Holland Kemble in season three . She is hired by William van der Woodsen to seduce Rufus in order to break up him and Lily . Luke Kleintank portrays Elliot Leichter , Eric 's bisexual love interest , in seasons three and four . Jessica , portrayed by Alice Callahan in seasons three , four and five , is one of Blair 's new minions at Columbia . </P>
<P> Joanna Garcia portrays Bree Buckley in the first four episodes of season three . Her and Nate 's families are rivals and they begin a `` Romeo and Juliet '' kind of relationship . When she finds out that her cousin is left at the altar at her wedding to Carter Baizen , she tries to get revenge on him for her family , which leads to her and Nate 's break - up . Olivia Burke is portrayed by Hilary Duff in season three . She is a famous movie star that starts a relationship with Dan . They break up when she realizes Dan has feelings for Vanessa . Deanna Russo portrays K.C. Cunningham , Olivia Burke 's publicist and Serena 's former boss , in season three and for one episode in season four . Laura Harring portrays Elizabeth Fisher in season three . She 's Chuck 's mother , who was thought to have died when giving birth to Chuck . She reveals to Chuck that she left when he was born , because she was nineteen and had no intentions of marrying Bart . Bart later paid her to stay away from their son . She also dated Chuck 's uncle Jack in the past , who she gave Chuck 's company to after he had given it to her . Sherri Saum portrays Holland Kemble in season three . She is hired by William van der Woodsen to seduce Rufus in order to break up him and Lily . Luke Kleintank portrays Elliot Leichter , Eric 's bisexual love interest , in seasons three and four . Jessica , portrayed by Alice Callahan in seasons three , four and five , is one of Blair 's new minions at Columbia . </P>
who plays serena 's boss on gossip girl
who plays serena 's boss on gossip girl
Deanna Russo
Deanna Russo