"I Knew You When" is a song recorded by Canadian pop rock band Marianas Trench. It was released on November 16, 2018 as their first single from their fifth studio album Phantoms. The song was accompanied by its music video released in December 2018. It reached within the top 30 on the Canada CHR/Top 40 and the Canada Hot AC charts.

Composition and lyrics
The band teased a preview of the song via social media on November 5, 2018. "I Knew You When" has been described as a dance-oriented and pop rock song. Lead singer Josh Ramsay spoke to Substream Magazine on the meaning behind the song.

Ramsay wrote and produced the track. The song runs at 106 BPM and is in the key of E major.

Music video
The music video for "I Knew You When" was released on YouTube on December 19, 2018 and was directed by Kyle Davison.

Personnel
 Josh Ramsay – vocals, rhythm guitar
 Matt Webb – lead guitar, backing vocals
 Mike Ayley – bass, backing vocals
 Ian Casselman – drums, backing vocals

Charts

References

2018 singles
2018 songs
604 Records singles
Songs written by Josh Ramsay
Marianas Trench (band) songs