[4] With a lineup consisting of singer/guitarist Sophie Hopes, lead guitarist Matt Tanner, bassist Nick Vasey, and drummer Ethan Darnell,[5] the group released two EPs: All We Didn't Know in 2013 and Figurine in 2015.

Their debut album, Dumb Days, was released in September 2017, produced by Violent Soho's Luke Boerdam.

[7] Hopes and Tanner attended the same high school in Perth, initially performing acoustic folk music together,[8] before branching out to songwriting, inspired by busking in Fremantle and listening to The Smashing Pumpkins' Siamese Dream.

Tired Lion supported several acts on tour, such as Violent Soho, Gyroscope, Spiderbait, The 1975, British India, Kingswood, and Luca Brasi.

[9][15] On Tuesday 6 March 2018, Guitarist Matt Tanner stated via Facebook that he would be parting ways with the band after having played guitar with them since their inception.