Nonesuch Records, which released the soundtrack to Richard Linklater's multiple Golden Globe Award–winning film Boyhood last year, has now digitally released two additional songs written specifically for the movie by Ethan Hawke: “Split the Difference (Daddy’s Lullaby),” performed by Hawke and Charlie Sexton, and “Ryan’s Song,” performed by Hawke with Ellar Coltrane, Lorelei Linklater, and Jennifer Tooley. The two new tracks are available now on iTunes and in the Nonesuch Store.

Shot over 12 years with the same cast, Boyhood is a groundbreaking story of growing up as seen through the eyes of a child named Mason (a breakthrough performance by Ellar Coltrane), who literally grows up on screen before the viewers’ eyes. Starring Ethan Hawke and Patricia Arquette as Mason’s parents and newcomer Lorelei Linklater as his sister Samantha, Boyhood charts the rocky terrain of childhood like no other film before. Jonathan Sehring, John Sloss, and Cathleen Sutherland produced the film with Linklater.

Hawke recently explained to the Hollywood Reporter: “When Rick [Linklater] and I decided to make my character a songwriter, he gave me the challenge to write some songs for the movie. We didn’t know at that time whether they would be in the movie or not, but it allowed me to take some time and get into character … If it had been a normal movie I never would have been able to come up with two songs, but I had 12 years!” He continues, “Rick said, ‘Over the course of the next year, try and write a song.’ I played it for him and he loved it and he said, ‘Why don’t you play it for the kids in the movie?’ Then we came up with another one that seemed appropriate for the film and incorporated it into the story.”