Kristoffer Polaha landed one of his earliest acting gigs on the WB's Birds of Prey, playing the mysterious superhero Darkstrike. Kristoffer was most recently seen as Jason Matthews on Fox's North Shore.

Kristoffer, a graduate of New York University's Tisch School of the Arts, has appeared in episodes of popular series Angel, Roswell, That's Life, and Tru Calling, and starred in the unaired Fox pilot Third Degree.

On the big screen, Kristoffer starred in Michael Ferry's independent film Aller simple pour Manhattan (also known as Petty Crimes). Kristoffer's theatrical credits include the plays Ragtime Revue at Lincoln Center, Long Day's Journey Into Night at Roundabout Theater and Bread and Butter at Provincetown Playhouse. He also played the title role in Richard III and Astrov in Uncle Vanya at the Stella Adler Conservatory.

Kristoffer is also known for playing the title role in the TBS telefilm America's Prince: The John F. Kennedy Jr. Story.

Kristoffer and his wife, actress Julianne Morris, currently reside in both Hawaii and Los Angeles. Julianne gave birth to their first child, Kristoffer Caleb, on July 28, 2004, in Honolulu.