Asaf "Assi" Dayan (born November 23, 1945) is an Israeli film director, actor, screenwriter and producer. He has been nominated for 7 various awards, including a Golden Globe, and received 10 awards, including a Lifetime Achievement Award from the Israeli Film Academy.
Son of Moshe Dayan, former Israeli chief-of-staff and defense minister. Brother of Yael Dayan, Israeli MK (Labor), and Udi Dayan, sculptor. He has 4 children.
Dayan played the leading role of psychologist Reuven Dagan in the TV drama series Betipul . His character is played by Gabriel Byrne in the HBO adaptation, In Treatment.