In October 2010, she was invited by Lauren Faust, the co-creator and producer for Foster's Home for Imaginary Friends, to help write on Hasbro's television revival of its My Little Pony franchise. McCarthy, on a writing hiatus at the time, was inspired to accept by Faust's dedication and the strong female characterization she had presented.[2] In 2011, Faust left the show after the two-part season two premiere, and McCarthy was promoted to co-executive producer for its third season onward; she also served as the show's story editor.[3] In early June 2015, Hasbro promoted McCarthy to become the company's new "Head of Storytelling" for their brands, My Little Pony and Littlest Pet Shop; her role will be to help "create expansive worlds and characters" across these brands, according to Hasbro's executive vice president Stephen Davis.[1]
In addition, McCarthy has written and helped produce the spin-off films, My Little Pony: Equestria Girls and its sequel. She was nominated for a Daytime Emmy for "Outstanding Original Song - Children's and Animation" for her lyrics in the Friendship Is Magic episode "Sweet and Elite".[4]
On November 3, 2017, Hasbro Studios and Paramount extended their relationship with an exclusive five year production deal for Allspark Pictures and Allspark Animation for original and toy based films. Both Allspark units are newly formed (Allspark Pictures formerly was a financing label) with the film unit head by Greg Mooradian and the animation unit head by Meghan McCarthy. Paramount and Hasbro would also work together on TV series.[5] Following Hasbro’s purchase of Entertainment One in 2019, though, Allspark would later close down and be absorbed into the newly-acquired production company.
Writer from 2010-2016 Showrunner from 2012 to 2016 Story editor from 2012 to 2015 Co-executive producer from 2013 to 2015, 2018–2019 Wrote 35 episodes, 25 songs
^Snider, Brandon T. (2013). My Little Pony: The Elements of Harmony: Friendship is Magic: The Official Guidebook. Little, Brown Books for Young Readers. ISBN978-0-316-24754-2.