Snow Patrol has pulled out of Suffolk's Latitude Festival next month due to one of the band members suffering a neck injury.
The Stereophonics will now replace the band in the line-up, headlining the Saturday night.
It also means the band will not be playing at Glastonbury which starts this week.
A message on Latitude's Twitter account said: "We're sad that Snow Patrol can't join us at Latitude this year, and wish Johnny and Nathan a speedy recovery.
"We're beyond thrilled that the brilliant Stereophonics have extended their sold out Summer tour to join us as headliners on Saturday 20th July."
Also on the bill are George Ezra, Lana Del Rey and Underworld. During their two-decade career, the Stereophonics have produced hits such as Have A Nice Day, I Wouldn't Believe Your Radio and Handbags And Gladrags.
Latitude runs from July 18 to 21.