Television:
* The O.C. (2003-2007): Played the role of Kaitlin Cooper, a rebellious and troubled teenager.
* Gossip Girl (2007-2012): Guest starred as a young socialite named Agnes Andrews in a recurring role.
* Arrow (2012-2020): Played the role of Thea Queen/Speedy, Oliver Queen's younger sister.
* Supergirl (2015-2021): Guest starred as Thea Queen/Speedy in a crossover episode with Arrow.
* The Wilds (2020-present): Plays the role of Shelby, one of the girls stranded on a deserted island.
Movies:
* The Quiet (2006): Her feature film debut, playing the role of Dot.
* The Sisterhood of the Traveling Pants 2 (2008): Played the role of Effie, a friend of the main characters.
* Trigger (2010): Played the role of Sarah.
* The Removal (2011): Played the role of Jenny.
* The Last Keepers (2017): Played the role of Riley.
* The Dustwalker (2022): Played the role of Amelia.
Other Projects:
* Voice acting: Holland has voiced various characters in animated series such as *Justice League: Crisis on Two Earths* and *Justice League: The Flashpoint Paradox*.
This list isn't exhaustive, but it covers some of her most prominent projects. You can find a more complete filmography on websites like IMDb.