Corey Feldman was in Goonies, which was directed by Steven Spielberg, who was involved in some movie called Raiders of the Lost Ark with George Lucas. Who's responsible for Episode 1.

Let's just reminisce about the goodness of the Goonies for a second, shall we?

Okay, that's plenty.

The Two Coreys were child stars in some famous flicks. So was Drew Barrymore. Like Haim, Drew also spent her childhood in rehab de-toxing from various substances.
A well-known movie about drug addiction, Trainspotting, featured a then little-known Ewan McGregor. Ewan McGregor was the ONLY GOOD ACTOR in Star Wars Episode 1.

Ha. Stump THIS. (rhythman@hotmail.com)

Well, I can't fault your logic.

Honorable mention to dtoxopeu@carleton.ccs.ca, whose e-mail I lost.  

Here are a few ways I thought of that don't involve directors or heroin.

At least, as far as I know.

Corey Feldman was in National Lampoon's Loaded Weapon 1... with Samuel L. Mother-filkin' Jackson. 2 degrees.

The Coreys were in a dirty, naughty movie called Blown Away with Nicole "I'm Naked In It" Eggert, who was in The Demolitionist with Bruce Campbell... who was in Darkman at the very end. With Liam Neeson. 3 degrees.

And finally, the Two Coreys were together in their Academy Award-winning License to Drive with Heather Graham, who was in the zany Say It Isn't So with Sally Field, who was in the boo-hooey Where The Heart Is with Natalie Portman. 3 degrees.