Blake Lively was back as Serena van der Woodsen to work on the upcoming sixth and final season of Gossip Girl recently. A production team shared a series of behind-the-scenes pictures from the set, showing Blake done up as her Upper East Side character along with her costars Chace Crawford, Leighton Meester, Penn Badgley, and Ed Westwick. Leighton was also looking fancy as Blair Waldorf, while the guys donned suits. The show will be back on the CW network later this year, on Monday, Oct. 8. It will be a shortened season and is expected to conclude before Christmas. It seems Blake was able to fit in some work between hangouts with her boyfriend, Ryan Reynolds. Blake Lively wore a bikini last week for some Fourth of July fun with her man, as well as her tight-knit family.