He was born on April 14, 1993, in Laguna Beach, California. He was raised Episcopalian, and during his K-12 school years, attended St. Margaret's Episcopal School in San Juan Capistrano, California. He dated singer Ariana Grande from 2008 to 2011. Phillips entered Princeton University in the fall of 2012, majoring in history.
Phillips starred as Evan Goldman in the musical comedy 13 on Broadway at the Bernard B. Jacobs Theatre which opened October 5, 2008, and closed January 4, 2009. It was directed by Jeremy Sams, choreographed by Christopher Gattelli, and its music and lyrics were by Jason Robert Brown and book by Dan Elish and Robert Horn.
Prior to his role in 13, Phillips played the title role in The Little Prince with the New York City Opera at Lincoln Center. The New York Times critic called Phillips' performance in the title role "smashing." From there Phillips went directly into the world premiere of An American Tragedy at the Metropolitan Opera where he played the part of Young Clyde, both opening and closing the opera with a solo.
Phillips' other professional stage credits include A Christmas Carol: The Musical on Broadway performed at Madison Square Garden where he sang the role of Tiny Tim to Jim Dale's Scrooge; The Ten Commandments: The Musical with Val Kilmer at the Kodak Theatre in Los Angeles. Phillips, at ten years old, was the second youngest person to sing the National Anthem to open a Los Angeles Dodgers baseball game (behind 9-year-old Jessica Givens in 1990). He has also debuted original songs composed by Martin Charnin and John Kander in New York.
Film and television
Phillips had a co-starring role as Jordan Baxter, the middle son, in the feature film Evan Almighty, starring Steve Carell, Morgan Freeman, and Lauren Graham, which premiered June 22, 2007. In the fall of 2007, he completed work on the feature film Stolen Lives starring Josh Lucas. Phillips also played the lead role in Ben 10: Race Against Time. His television credits include The Good Wife, Crossing Jordan, Judging Amy, The King of Queens, White Collar, and the Hallmark film Love's Long Journey.
Phillips, along with the rest of the cast of The Good Wife, has received three Screen Actors Guild Award nominations for Outstanding Performance by an Ensemble in a Drama Series. He has also received three Young Artist Award nominations; Best Performance By a Leading Young Actor in a TV Movie, Miniseries or Special for his role in Ben 10: Race Against Time, Best Performance by a Supporting Young Actor in a Feature Film for his role in Evan Almighty, and Best Supporting Young Actor in a TV Series for his role in The Good Wife. He also plays Roger in the go90.com series Guidance.
Phillips played Nick St. Clair in the second season of the teen drama television series Riverdale.
In 2019, Phillips made his feature filmmaking debut with The Bygone, which he co-wrote and co-directed with his brother, Parker Phillips. The brothers are currently signed to direct Rumble Through The Dark, a film based on The Fighter by Michael Farris Smith.