Dan was born in Brooklyn, New York, the second child of Shari, an English teacher, and Richard Fogler, a surgeon. Before he attended the School of Theatre at Boston University, he went to Poly Prep Country Day School and graduated in 1994.
He established himself in his Broadway debut as William Barfée in the Broadway musical hit The 25th Annual Putnam County Spelling Bee. His performance won him a Tony Award for Best Featured Actor.
His first television appearance was in 2002 on FOX's 30 Seconds to Fame as a contestant impersonating Al Pacino.
- Balls of Fury
- Horton Hears a Who!
- Take Me Home Tonight
- Fantastic Beasts and Where to Find Them
- Fantastic Beasts 2: Crimes of Grindelwald
- The Goldbergs
- He was one of the main character on the Fantastic Beasts Franchise, there he worked along fellow actress Samantha Morton, who plays Alpha, even if they didn't share scenes together.