And They Sing Too!

She also sings in "Miss Pettigrew Lives for a Day"

(suggested by aronsson-jessica)

She also sings in "Inside Llewyn Davis"

Sings a song called "Broken," which can be heard during the ending credits of Kiss Kiss Bang Bang. (suggested by Rafael_M)

He also sings in "Les Miserables"

She also sings in the "Pitch Perfect" films

He also sings in "Hairspray"

(suggested by alioth4)

Scarlett sings the Academy Award nominated song "Before My Time" from the documentary film Chasing Ice. (suggested by Rafael_M)

She also sings in "Ella Enchanted"

Emilia Clarke sings in "Dom Hemingway"

Scott Bakula sings in an "Quantum Leap" episode. (suggested by jalapenoman)

(suggested by alioth4)

Val Kilmer sings in "The Doors" (suggested by Dweezer)

She also sings Dear John and Les Miserables. (suggested by aronsson-jessica)