Tegan Rain Quin y Sara Keirsten Quin nacieron el 19 de septiembre de 1980 en Calgary, Alberta, Canadá. Desde muy temprana edad, las gemelas mostraron un interés ferviente por la música. Al crecer en una casa llena de discos y guitarras, no era raro verlas tocando o experimentando con melodías y letras desde que tenían ocho años.
Durante su adolescencia, Tegan y Sara comenzaron a escribir y grabar sus propias canciones. En 1998, con solo 18 años, ganaron una competencia de radio local cuyo premio era tiempo de estudio profesional para grabar un álbum. Este evento marcó el punto de partida de su carrera profesional y poco después, lanzaron su primer álbum "Under Feet Like Ours" de forma independiente en 1999.
En el año 2000, firmaron con el sello Vapor Records, fundado por Neil Young. Este acuerdo cimentó su camino a la fama. Su segundo álbum, "This Business of Art" (2000), fue bien recibido por la crítica y les permitió iniciar giras más extensas en Canadá y Estados Unidos, abriendo para bandas como Neil Young y The Pretenders.
Con el lanzamiento de "If It Was You" en 2002 y "So Jealous" en 2004, la dupla alcanzó una notoriedad aún mayor. "So Jealous" en particular hizo que captaran la atención del público internacional, gracias a canciones como "Walking with a Ghost", que fue versionada por la popular banda The White Stripes.
Showers pounding out a new beat
I trade my old shoes for new feet
I grab a new seat
I don't like the one I got the fabric's wearing through
And it's wearing me out
You're wearing me down
Watching old baseball games and low budget telethons
Ain't like watching you yourself, when you yourself is on
Got time to wander to waste and to whine
But when it comes to you
It seems like I just can't find the time
So watch your head and then watch the ground
It's a silly time to learn to swim when you start to drown
It's a silly time to learn to swim on the way down
If I gave you my number, would it still be the same
If I saved you from drowning promise me you'll never go away
Promise me you'll always stay
Closed down the last local zoo
I'm gonna win the endless war
Over who kills the last koala bear
And who in death will love him more and I
He grabs me by the hand
Drags me to the shore and says
Maybe you don't love me
But you'll grow to love me even more
And I, well I'm not surprised
If I gave you my number would it still be the same
If I saved you from drowning promise me you'll never go away
Promise me you'll always stay
Showers pounding out a new beat
I trade my old shoes for new feet
I grab a new seat
I don't like the one I got the fabric's wearing through
And it's wearing me out
You're wearing me down, oh oh
You're wearing me down, oh oh
So watch your head and then watch the ground
It's a silly time to learn to swim when you start to drown
It's a silly time to learn to swim when you start to drown
If I gave you my number would it still be the same
If I saved you from drowning promise me you'll never go away
Oh, if I, if I gave you my number would it still be the same
If I, if I saved you from drowning promise me you'll never go away
Promise me you'll always stay
Promise me you'll always stay