Lavie was born in Tel Aviv and spent his youth in Israel. In 1997, his play Sticks and Wheels and his production of it were awarded the main prizes at the Acco Festival of Alternative Israeli Theatre. The production played in Tel Aviv during 1998. In that year he went to London to study theatre directing at the London Academy of Music and Dramatic Art (LAMDA). After his graduation, two of his plays were produced in various London theatres. They already contained several songs written and composed by him.

In 2001, Lavie moved to New York City where he directed several workshops on his plays, and gradually shifted his focus to songwriting. In 2003, he relocated to Berlin and began recording his first album, The Opposite Side of the Sea, which he self-produced. The album was released in Europe in January and February 2007, and in the United States in March 2009.

In 2009, his stop motion style music video, “Her Morning Elegance”, featuring Shir Shomron, an Israeli-born actress/model, achieved significant popularity on YouTube, receiving over 30 million views. Lavie produced and co-directed the video with Merav and Yuval Natan, which was shot in 48 hours without a break.

His first book for children, The Bear Who Wasn’t There, was first published in 2014 and has since been translated to numerous languages, and published throughout the world.