Answer: mikey

AnswerCrossword Clue
MIKEY

Finicky kid in a Life cereal ad

MIKEY

"Life with ..": 1993 Michael J. Fox film

MIKEY

Life cereal spokesperson

MIKEY
He famously liked Life cereal
MIKEY
Cereal eater of old ads
MIKEYBoy in Life cereal ads
MIKEY"Life with ..." (1993)