'All Is By My Side' also stars Hayley Atwell and Imogen Poots
The 1975 are also added to the bill at this year's Budapest bash
Rap duo play first since in 12 years on same bill as Haim, The Replacements and The Knife as US festival begins
Biopic has its US premiere at South By Southwest this week
Chance The Rapper is also added to the bill for the Danish bash
One half of US hip-hop duo denies rumours of a new record
Hip-hop duo will perform at Canadian event
Big Boi and Andre 3000 will play the Friday night of the Isle of Wight bash
OutKast will embark on a reunion tour of global festivals this summer
Big Boi and Andre 3000 are rumoured to be working on their own LPs