Karen Gillan is bidding a fond farewell to her time as a Guardian of the Galaxy.«I actually have to admit it, I've been in denial about this… But yeah, all stories must come to an end,» the actress told ET's Ash Crossan at thepremiere in Los Angeles on Thursday. «It's bittersweet and sad, but we're proud of what we've done.»When asked to describe the final installment for fans, Gillan offered a rollercoaster of adjectives, saying, «Fun, funny and devastating.»But she was loving her time on the last red carpet, surrounded by the ardent support of MCU fans once more.«These premieres are always like premieres on steroids,» she marveled.