First: Wil Wheaton
Wil Wheaton was in "Toy Soldiers" with Sean Astin, who was in "White Water Summer" (I think that's the name...) with Kevin Bacon, who was in "Telling Lies In America" with Brad Renfro, Who was in "The Cure" with Joseph Mazzello.
Next: Jeremy Davies
I am not sure how I can link Joe Mazzello with Haley. But, Haley Joel Osment in the Sixth Sense with Bruce Willis . Bruce Willis in Armeggedon with Ben Affleck. Ben Affleck in Jersey Girl (2004) With I don't know that is as far as I can go.
Try this instead:
Haley was was in The Sixth Sense with Bruce Willis who was also in North alongside Elijah Wood who was alongside Joseph Mazzello in Radio Flyer.
Or alternatively:
Haley was in Bogus alongside Whoopi Goldberg. She was also alongside John Wood in Jumpin' Jack Flash. John Wood starred in Shadowlands which stars Joseph Mazzello.