Question: Who starred as Mary in the film 2017 film about an intellectually gifted 7-year-old who becomes the subject of a custody battle between her uncle and grandmother?

Context paragraphs:
Open Window School: Open Window School is an independent school for students in Kindergarten through Eighth Grade who have been formally identified as intellectually gifted.  It is located in Bellevue, Washington, United States and accredited by the Northwest Association of Independent Schools (NWAIS).

Mckenna Grace: Mckenna Grace (born June 25, 2006) is an American child actress.  She is known for playing the role of Jasmine Bernstein in the series "Crash & Bernstein" and Faith Newman in "The Young and the Restless".  s of 2016 , she plays Penny Kirkman in the ABC television series "Designated Survivor".  In 2017, she starred as Mary in the film "Gifted", and appeared in the film "How to Be a Latin Lover" as Arden.

Lucille Hunter Elementary School: Lucille Hunter GT/ AIG Basics Magnet Elementary School, also known as Hunter Magnet Elementary School, formerly Lucille Hunter School, is a historically black elementary school for academically intellectually gifted students in downtown Raleigh, North Carolina.  Hunter Elementary offers Gifted & Talented curriculum and was Wake County's first magnet school.  The school was the first school in North Carolina to be named after an African-American educator.

Academy for Gifted Children: The Academy for Gifted Children is a non-denominational elementary and high school in Richmond Hill, Ontario, Canada (12 Bond Cres).  Entrance is by a competitive examination.  The school has been designed to support intellectually gifted children, and it allows children from grades 1 to 12 to enter.

Governor's School of North Carolina: The Governor's School of North Carolina (GS, GSNC) is a publicly funded residential summer program for intellectually gifted high school students in the state of North Carolina.  North Carolina's Governor's School was the first such program in the United States, and has given rise to similar programs for gifted students in many other states.

Simon Barlow: Simon John Barlow is a fictional character from the British ITV soap opera, "Coronation Street", and has been played by Alex Bain since 2008.  The character was originally played by twins, Jake and Oscar Hartley, on his birth in 2003.  Simon is the son of Peter Barlow (Chris Gascoyne) and Lucy Richards (Katy Carmichael), the adoptive son of Leanne Battersby (Jane Danson) and the grandson of Ken Barlow (William Roache).  His storylines have included his mother's death, a custody battle between Peter and his maternal grandfather, a custody battle between Peter and Leanne and Simon physically abusing Leanne.

Quest Academy (Palatine, Illinois): Quest Academy is an independent school for intellectually gifted students located in Palatine, Illinois.  The school is accredited by the Independent Schools Association of the Central States, and it is a member of the National Association of Independent Schools and the National Association for Gifted Children.

Gifted (film): Gifted is a 2017 American drama film directed by Marc Webb and written by Tom Flynn.  It stars Chris Evans, Mckenna Grace, Lindsay Duncan, Jenny Slate, and Octavia Spencer.  The plot follows an intellectually gifted 7-year-old who becomes the subject of a custody battle between her uncle and grandmother.  The film was released on April 7, 2017, by Fox Searchlight Pictures, and grossed $39.6 million worldwide.

Georgia Governor's Honors Program: The Georgia Governor's Honors Program is a summer educational program in the state of Georgia, in the United States.  It is a four-week (formerly six-week prior to 2011, and originally eight-week) summer instructional program designed to provide the intellectually gifted and artistically talented high school students of Georgia challenging and enriching educational opportunities not usually available during the regular school year.  Activities are designed to provide each participant with opportunities to acquire the skills, knowledge and attitudes to become independent, lifelong learners.  Many GHP alumni have commented on the experience as unforgettable and one of the most amazing things they have ever participated in.  There are several notable alumni.

Pine View School: Pine View School for the Gifted is a public, college-preparatory, coeducational school located in Osprey, Florida.  The school is the only full-time program in Florida for intellectually gifted students in the elementary through high school level.  The mission of Pine View School is to provide a qualitatively different learning environment that nurtures a passion for intellectual curiosity; encourages risk taking, and independence; and is committed to a tradition of academic excellence and social responsibility.  There are currently around 2,210 students at Pine View.  Pine View serves students in 2nd through 12th grades.

Supporting paragraphs: Mckenna Grace Gifted (film)
Answer: Mckenna Grace