'Gossip Girl' came to an end last year, after six seasons, and plans for a big screen version are said to have been discussed.
While some of the other stars of the show are believed to be eager to reprise their roles, Lively isn't sure about returning to play her character, reported Star magazine.
The 25-year-old blonde has reportedly "infuriated" her former co-stars by being less than enthusiastic about the project.
'Gossip Girl' proved a successful vehicle for several members of the cast including Leighton Meester, Ed Westwick, Chace Crawford and Penn Badgley, who have all gone on to land further acting roles.
Lively has also done well from the show, appearing in movies including 'Savages', 'The Town' and 'Green Lantern' - where she met her now-husband Ryan Reynolds.