Keren's early career included work on the children's series Parpar Nehmad. he has also appeared on the British comedy-drama Love Hurts, and on such Israeli series as Shabatot VeHagim and Miluim. Film credits include Made in Israel, Sipurei Tel-Aviv, and the 2008 English-language film Adam Resurrected. His other credits range from the Israeli version of Whose Line Is It Anyway? to the Tel Aviv production of the musical The Producers (as Leo Bloom). Active in dubbing, Keren has been the Hebrew voice of Gary Oldman Harry Potter movies, Dick Van Dyke in Mary Poppins, Johnny Depp in Willy Wonka and the Chocolate Factory, and in animation, Woody (in the Toy Story series) and the title characters in Rango and Puss in Boots.