He will work on developing new global business, as well as providing direction across Stream\'s broadcast and film departments. Tehan will report to the managing director, Gemma Newland.
Tehan joins from Berlin Cameron United in New York, where he worked on the Coca-Cola and Boost Mobile business after joining the WPP-owned agency as an account director in 2002.
Stream\ also unveiled its new corporate identity this week, with a view to defining its position as a full-service entertainment agency. The agency has worked closely with TBWA\London on a number of integrated campaigns for clients, most recently including Nivea and PlayStation 3.
Newland said: "Luke is a perfect fit in our ever-expanding team and will drive the offering at an exciting time in its growth."
Tehan added: "Stream\ is a dynamic and innovative company that has an enviable client list. I am looking forward to helping it drive its continued growth across new and existing clients."