{{content.title}} More Willa Holland Willa Holland DA MAN Magazine Wiki Starred on the hit TV show The O.C. as Marissa Cooper’s sister Kaitlin Cooper. She also appeared on the popular series Gossip Girl on The CW. Willa Holland Age 33 years (June 18, 1991) Zodiac Sign Gemini Willa Holland Celebrates the 100th Episode of Arrow 10/23/2016 Willa Holland Annual ELLE Women In Music Celebration in Hollywood Willa Holland Vanity Fair and FIAT Celebration of Young Hollywood in Los Angeles Willa Holland Annual PaleyFest Arrow The Flash Event in Hollywood Willa Holland CW Upfront Party in New York Willa Holland GQ Men Of The Year Party in Los Angeles Willa Holland IGN Comic-Con Portraits Willa Holland Elton John AIDS Foundations Oscar Viewing Party in West Hollywood Willa Holland Annual Elton John AIDS Foundation Academy Awards Viewing Party in Los Angeles Willa Holland Out in West Hollywood