Thank You, I'm Sorry began in 2018. The band started as the solo project of lead singer Colleen Dow.[1] In early 2020, the group signed to Michigan based record label Count Your Lucky Stars Records.[2] As a solo project, Dow recorded and released an acoustic album in February 2020 titled The Malta House.[1] The album title is a reference to the Malta, Illinois.[1] After the release of The Malta House, the project expanded to a four-piece, consisting of Dow, bassist Bethunni Schreiner, guitarist Abe Anderson, and drummer Sage Livergood.[1] The group released their debut album I'm Glad We're Friends on August 21, 2020, through Count Your Lucky Stars.[3] The album received positive reviews.[4] In early 2022, the band released a new song titled "Parliaments".[5][6] Their sophomore album, Growing in Strange Places, was released on September 29, 2023, which was their final release under Count Your Lucky Stars. On January 31, 2024, they announced an EP titled Repeating Threes to be self-released on March 8.
On May 29, 2024, it was announced that Anderson and Schreiner would be leaving the band to pursue other endeavors, and that Dow and Livergood would continue Thank You, I’m Sorry "alongside some new members".[7]