Thomas Tantrum are an English indie pop band from Southampton, England.

English singer-songwriter Lily Allen is considered one of Thomas Tantrum's famous fans.

The band gained greater exposure in 2008 after Allen placed them in the "Top Friends" section of her MySpace page.

In 2007, Thomas Tantrum performed live at the Maida Vale Studios for BBC Radio One.

Ian Barnett, friend to bassist Jimmy Shivers, stepped in as drummer for a charity show before the official new drummer Dave Wade Brown was introduced in a MySpace blog entry on 3 April.