Phillipson is mainly a theater actor and has appeared in plays such as West Side Story (as Tony), A Christmas Carol (Fred), Arsenic and Old Lace (Mortimer), Narnia – The Lion, the Witch and the Wardrobe (Mr. Tumnus), A Clockwork Orange, Fiddler on the Roof and Les Misérables (Marius).
Some of his other voice work includes Prince Charming in Shrek 2 and Shrek the Third, Casey Jones in TMNT – Teenage Mutant Ninja Turtles, and Son-Goku in Dragon Ball Z.. He dubbed Johnny Depp in the Tim Burton movies Charlie and the Chocolate Factory and Alice in Wonderland and Clark Gregg in Mr. Popper's Penguins.
In 2008, he made his movie debut in Den Milde Smerte and Flammen og Citronen. In 2016, he made his Hollywood debut as John F. Kennedy in the movie Jackie.
- Official site in English