Simplify the following text for a Grade 8 native English-speaking person.
Original: Frank Anthony Iero Jr ( born October 31 , 1981 ) is the rhythm guitarist , co-lead guitarist and backup vocalist of the alternative rock band My Chemical Romance as well as the vocalist of the hardcore punk band Leathermouth .
Simplified: Frank Anthony Iero ( born October 31 , 1981 ) is the youngest member of the band My Chemical Romance .