Sierra The Nerdy Troublemaker is a Disney XD Original series that is first a series of skits on the short-lived Sketch This!. It is a full TV Show that is created by Stephen Holman (who earlier did Kids' WB!'s Phantom Investigators in 2002), and ran for four Seasons and one-hundred and four episodes from September 1, 2012 until February 27, 2016. It is Wholesome Products Inc.'s second show to be released, as well as the third in the Disney/Stretch Films Inc. collection (with the first being Lisa Papademetriou's Accidentally Adventures and the second being Jose F. Mojica's Jeff and Taylor).
- Follow the adventures of 12-year-old Sierra Norman, as she and her family and friends live together in the town of Hopswell Mountains.
- Sierra Norman (voiced by Eden Sher) is the 12-year-old protagonist of the series who loves to make pranks.
- Ashley Norman (voiced by Tara Strong) is Sierra's 16-year-old Sister who is a basement liver.
- Tamara Norman (voiced by Candi Milo) is Sierra's 14-year-old sister who is the replacement of the late Charles Norman.
- Lizzie Norman (voiced by Stephanie Morgenstern) is Sierra's 10-year-old Sister who is the replacement of the late Silas Norman.
- Carol and Stephen Norman (voiced by Kari Wahlgren and Tom Kenny) are Sierra and her sisters' parents.
- Buster Richardson (voiced by Billy West) is Sierra's lover who recognizes her as an idol.
- Moria Phillips and Desiree Frances (voiced by Grey Griffin and Jessica DiCicco) are Sierra's best friends who are mostly hanging out with her.
- Bertha Sparks (voiced by Jennifer Hale) is Sierra's mean rival whose parents are dead in a car accident. She currently lives with her Aunt Melody Sparks.
- Principal Hanna Wilson (voiced by Nadine Rabinovitch) is the strictest principal in Sierra's school who wants to keep her students running.
- Donna Nichols and Andi Barton (voiced by Andrea Baker and Kelly Sheridan) are friends to Bertha and rivals to Moria and Desiree.
- Nozzle (voiced by Katie Griffin) is the Norman Family's pet cat who has white fur and meows constantly.
- Maverick Richardson (voiced by Danny Cooksey) is one of Buster's three brothers who is 16-years-old.
- Gareth Richardson (voiced by Greg Cipes) is Buster's 14-year-old brother who doesn't take the instance.
- Diego Richardson (voiced by Lainie Frasier) is Buster's 10-year-old brother who always reminds himself to make a focus.
- Harper and Seymour Richardson (voiced by Jocelyn Loewen and Dale Wilson) are Buster and his brothers' parents.
- Whammer (voiced by Frank Welker) is the Richardson Family's pet dog who barks as usual.
- and more
Season 1 (2012-2013)
Season 2 (2013-2014)
Season 3 (2014-2015)
Season 4 (2014-2015)
- Wholesome Products, Inc.
- Stretch Films Inc.
- Disney XD Original.
- This is the third show to be created by Stephen Holman.
- The styles for the series are similar to those from Life With Loopy and Phantom Investigators.
- It premiered a year after Motorcity and before Randy Cunningham: 9th Grade Ninja.