[1] A significant part of Filkins's childhood was spent intensely studying classical guitar in Barcelona, Spain.

During a drive home, Filkins and Tedder were discussing their favorite musicians and decided to form a band.

[4] He openly thanked and acknowledged her in the liner notes of OneRepublic's debut album, Dreaming Out Loud (2007).

In addition to guitar and background vocals, along with Brent Kutzle, he also aids friend and co-founder, Ryan Tedder, in writing and composing music for the band.

[3] After a few line-up changes the band solidified with Tedder on keyboards and lead vocals, Filkins and Drew Brown on guitar, Brent Kutzle on bass and cello and Eddie Fisher on drums and percussion.

[9] Filkins guest-starred as a forest ranger in the hit crime series Criminal Minds, Season 7 episode 6, titled "Epilogue".