Age: 51
male
Johnny Galecki is a Belgian-born American actor, best known for his roles as David Healy in Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, and as Leonard Hofstadter in The Big Bang Theory.
Johnny Galecki
Derek Lutz
for Derek Lutz in Back to School (1996)
Suggested by nickyhill
To help his discouraged son get through college, businessman Thorton melon decides to enter the school as a student himself.
