Now 30, Reitman's impressively replicating his father's cult success.
Ivan's Stripes was made for $10 million and grossed $85 million; Jason's Thank You For Smoking was made for $7 million and grossed more than $39 million.
His Oscar-nominated Juno, made for $7.5 million, has already taken in more than $100 million.
Moral: If the laughs are real, the applause will come.
In the picture: Jason, with dad Ivan Reitman
Also read: Complete list of Oscar nominees