Grazer co-founded Imagine Entertainment with Ron Howard in 1986. His credits include the movies "Apollo 13," "A Beautiful Mind" and "The Da Vinci Code," and the TV series "24."
"We are both really, really happy," Nguyen told the New York Post. "On Sept. 18, we will have been together for five years. We are not sure of the wedding date, but it will be in Los Angeles sometime around the fall. I will be writing a lot of music for my wedding. It is going to be very special."