He has also appeared in films such as Blockers and XOXO and in the recurring television roles of Nick St. Clair in Riverdale and Nate in Atypical.

[7] 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.

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 Tivens in 1990).

Phillips recorded a solo composed by Alan Menken and Stephen Schwartz for the film Noel starring Robin Williams and Susan Sarandon.

[9] 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.

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.

[16] With Grind, Phillips produced and acted in experimental adaptions of Sweeney Todd and The Last Five Years, and directed a short film titled Color + Light.