Infant Sorrow

Fictional British rock band from the motion pictures Forgetting Sarah Marshall (2008) and Get Him To The Greek (2010).

Lineup
The MySpace page for the band lists the following presumably fictional artists:
Aldous Snow - Vocals
Johnny Huxley - Guitar
Stix McGee - Drums
Mickey Fieore - Bass
Captain Knob - Guitar

In the film, the band consisted of the following actors:
Russell Brand (vocals)
Lenny Widegren (guitars)
Roger Joseph Manning Jr. (keyboards/guitars)
Sean Hurley (bass)
Victor Indrizzo (drums)