Question: Who was the actress that played in "Descendants"-(2015 American fantasy TV film) as well as played dual roles as both title characters on Disney Channel's "Liv & Maddie" ?

full_context: Document 1: Selena Gomez: Selena Marie Gomez ( ; ] ; born July 22, 1992) is an American singer and actress. Gomez began her career starring in the children's television series "Barney & Friends". She rose to fame playing the lead role of Alex Russo in the Disney Channel series "Wizards of Waverly Place" (2007–2012). She also starred in films such as "Ramona and Beezus" (2010), "Monte Carlo" (2011), and "Spring Breakers" (2013).
Document 2: List of Liv and Maddie characters: "Liv and Maddie", titled "Liv and Maddie: Cali Style" for the fourth season, for the fourth season, is an American sitcom created by John D. Beck and Ron Hart that premiered on Disney Channel on July 19, 2013, and ended on Disney Channel on March 24, 2017. The series stars Dove Cameron, Joey Bragg, Tenzing Norgay Trainor, Kali Rocha, Benjamin King, and Lauren Lindsey Donzis.
Document 3: Maleficent (film): Maleficent is a 2014 American dark fantasy film directed by Robert Stromberg from a screenplay by Linda Woolverton, and starring Angelina Jolie as the titular character with Sharlto Copley, Elle Fanning, Sam Riley, Imelda Staunton, Juno Temple, and Lesley Manville in supporting roles. Loosely based on Charles Perrault's original fairy tale and inspired by Walt Disney's 1959 animated film "Sleeping Beauty", the film portrays the story from the perspective of the eponymous antagonist, depicting her conflicted relationship with the princess and king of a corrupt kingdom.
Document 4: High School Musical (franchise): The "High School Musical" franchise consists of four Disney musical romantic comedy-drama films directed by Kenny Ortega and created by Peter Barsocchini. It stars Zac Efron, Vanessa Hudgens, Ashley Tisdale, Lucas Grabeel, Corbin Bleu, and Monique Coleman. The original film was released simply as a Disney Channel Original Movie, but after its huge success, it was followed by a television sequel. The received a theatrical release. Tisdale and Grabeel reprised their roles as Sharpay and Ryan Evans in a spin-off on the series titled "Sharpay's Fabulous Adventure", it was a direct to video film. Numerous international versions have been created, plus stage musicals and video games have been released, among other things. On March 1, 2016, a fourth installment was announced. The films have developed a cult following.
Document 5: Descendants (2015 film): Descendants is a 2015 American musical fantasy television film directed and choreographed by Kenny Ortega. The film stars Dove Cameron, Sofia Carson, Booboo Stewart, and Cameron Boyce as the teenage daughters and sons of Maleficent, the Evil Queen, Jafar, and Cruella De Vil, respectively. The film follows these teenagers adjusting to life outside their island prison, while on a mission to steal the Fairy Godmother's wand and free their parents from captivity.
Document 6: Kenny Ortega: Kenneth John "Kenny" Ortega (born April 18, 1950) is an American producer, director, and choreographer. He is best known for directing "Hocus Pocus", the "High School Musical" trilogy, "Descendants" and Michael Jackson's "This Is It" concerts.
Document 7: Sofia Carson: Sofía Daccarett Char, better known as Sofia Carson (born April 10, 1993), is an American singer and actress. Her first appearance on television was as a guest star on the Disney Channel show, "Austin & Ally". In 2015, she appeared as Evie, the daughter of the Evil Queen, in the Disney Channel Original Movie, "Descendants" and reprised her role in its 2017 sequel, "Descendants 2". In 2016, she appeared as Lola Perez in "Adventures in Babysitting", Melanie Sanchez in "" and Tessa in "".
Document 8: Descendants 2: Descendants 2 is a Disney Channel Original Movie that premiered on July 21, 2017 on Disney Channel, and was simulcast on Disney-owned networks ABC, Disney XD, Freeform, Lifetime and Lifetime Movies. It is the sequel to the 2015 film "Descendants". The film stars Dove Cameron, Cameron Boyce, Sofia Carson, Booboo Stewart, Mitchell Hope and China Anne McClain.
Document 9: JoJo Siwa: Joelle Joanie Siwa (born May 19, 2003), better known as JoJo Siwa or JoJo with the Big Bow, is an American dancer, singer, actress, and YouTube personality. She is known for appearing for two seasons on "Dance Moms" along with her mother, Jessalynn Siwa, and for her singles "Boomerang" and "Kid in a Candy Store". Siwa posts daily videos of her day-to-day life on her second YouTube channel JJ S'world.
Document 10: Liv and Maddie: Liv and Maddie, titled Liv and Maddie: Cali Style for the fourth season, is an American sitcom created by John D. Beck and Ron Hart that premiered on Disney Channel on July 19, 2013, and ended on Disney Channel on March 24, 2017. The series stars Dove Cameron, Joey Bragg, Tenzing Norgay Trainor, Kali Rocha, Benjamin King, and Lauren Lindsey Donzis.
Document 11: Rotten to the Core (song): "Rotten to the Core" is a song from Disney Channel's 2015 television film "Descendants", whose music and lyrics were composed by Joacim Persson, Shelly Peiken and Johann Alkenas. The song was performed in its original show-tune version in the film by the main cast – Dove Cameron, Cameron Boyce, Booboo Stewart and Sofia Carson– in their vocal roles as Mal (daughter of Maleficent), Carlos (son of Cruella de Vil), Jay (son of Jafar) and Evie (daughter of The Evil Queen). The song peaked at number 38 in the Billboard Hot 100. A second version, performed by actress and singer Sofia Carson, was released as a single on December 18, 2015.
Document 12: Liv and Maddie: Music from the TV Series: Liv and Maddie (Music from the TV Series) is a soundtrack to the Disney Channel Original Series, "Liv and Maddie". It features 12 songs performed by the show's star, Dove Cameron and a song performed by "Teen Beach Movie" star, Jordan Fisher. The soundtrack was released on March 17, 2015 by Walt Disney Records.
Document 13: Ashley Tisdale: Ashley Michelle Tisdale (born July 2, 1985) is an American actress, singer, and producer. During her childhood, Tisdale was featured in over one hundred advertisements and had minor roles in television and theatre. She achieved mainstream success as Maddie Fitzpatrick in the Disney Channel series "The Suite Life of Zack & Cody". This success was heightened when she starred as Sharpay Evans in the "High School Musical" franchise. The film series proved to be a huge success for Disney and earned a large following. The success of the films led to Tisdale signing with Warner Bros. Records, releasing her debut album, "Headstrong" (2007), through the label. The album was a commercial success, earning a gold certification from the Recording Industry Association of America (RIAA). She starred as Candace Flynn in the animated series "Phineas & Ferb" from 2007 to 2015.
Document 14: Josann McGibbon: Josann McGibbon is an American screenwriter working in partnership with Sara Parriott. The team's first major success as a screenwriter was the early Brad Pitt film, "The Favor". Their biggest hits since then include "Three Men and a Little Lady" and "Runaway Bride". In 2007, McGibbon and Parriott co-wrote and produced the hit Debra Messing miniseries, "The Starter Wife". "The Starter Wife" received 10 Emmy nominations in 2007, including for best screenwriting, and won one Emmy Award. It was also nominated for Golden Globe and Writers Guild awards, and was then produced as a series, also on USA Network. McGibbon and Parriott wrote and co-produced the Disney Channel movie, "Descendants" which was directed by Kenny Ortega and premiered in July, 2015. On February, 2013, it won the Writers Guild of America Award in television for Outstanding Children's Long Form. They then wrote and executive-produced "Descendants 2", also directed by Kenny Ortega, which was simulcast on the Disney Channel, ABC, and the other cable channels owned by Disney-ABC in July, 2017.
Document 15: Dove Cameron: Dove Cameron (born Chloe Celeste Hosterman; January 15, 1996) is an American actress and singer, best known for playing a dual role as both title characters in the Disney Channel teen sitcom "Liv and Maddie" and starring in "Descendants" as Mal, daughter of Maleficent. She reprised her role as Mal in "Descendants 2", which premiered on July 21, 2017, on Disney Channel.
ground_truth: Dove Cameron