The cast of Gossip Girl is getting sentimental since they all went back to work on their 6th and final season of the show. The actors are excited about moving on to new projects, but somewhat sad about leaving their friends on the show. Blake Lively and Penn Badgley (above) got romantic off screen during the course of the series and ended up dating for three years until 2010. Both have moved on to movies and new partners. Blake is happily living with Ryan Reynolds and Penn was last seen with Zoe Kravitz.