Sebu Simonian (born October 15, 1978;[3] Armenian: Սեպուհ Սիմոնեան)[4] is an Armenian-American musician, singer, songwriter,[5] and record producer,[6] one-half of the Los Angeles-based indie pop duo Capital Cities.

[1][10] Simonian's parents were from Beirut, Lebanon, but "because of a civil war [his] mum had to flee and [he] happened to be born in Syria.

[12] In 2004,[16] Simonian (as lead singer and keyboardist) and Ryan Welker, guitarist and backing vocals, formed the rock[17] band Aviatic.

[12] Simonian was featured on Brian Wilson's 2015 album No Pier Pressure, performing and producing the track "Runaway Dancer".

[22][23] Rolling Stone magazine named his beard the best at the 2014 Coachella Valley Music and Arts Festival and described it as "luxuriant [and] Rasputin-like" and rabbi-like.