Batmanglij produced and co-wrote two songs for The Walkmen frontman Hamilton Leithauser's solo album, Black Hours, which was released in June 2014. Also in 2014, Batmanglij produced two songs for singer Charli XCX. The song "Need Ur Luv" appears on her album Sucker and the song "Kingdom" featuring Simon Le Bon appears on The Hunger Games: Mockingjay, Part 1 – Original Motion Picture Soundtrack. In December 2014, Batmanglij along with Diplo and Ed Droste remixed Ty Dolla Sign's "Stand For" into a new song titled "Long Way Home". Batmanglij also wrote original music for a play by Kenneth Lonergan called This Is Our Youth, starring Kieran Culkin, Michael Cera, and Tavi Gevinson, which premiered on Broadway in 2014.