Son of Tell Schreiber, an actor, and Lorraine Reaveley, a psychotherapist.
Younger half-brother of Liev Schreiber.
His mother is from Vancouver, British Columbia. His father is American. His father's family has lived in the United States for many generations, and has German, Swiss-German, Danish, Dutch, English, French, Norwegian, Belgian (Flemish), Scottish, and Welsh ancestry.
He was named after Chilean poet Pablo Neruda.
Born on the same date as Stana Katic.
He has expressed an interest in playing the Marvel comics character Wolverine.