Robbie Arnett is known for Jexi (2019), Fun Size (2012) and Supernatural (2005). He has been married to Elizabeth Olsen since June 2021. So here's what we know about Robbie Arnett, Elizabeth Olsen's husband. Who is Robbie Arnett? Arnett, 31, is a musician from Los Angeles, who is part of the band Milo Greene. Robbie Arnett is a pop singer and multi-instrumentalist who co-founded the indie band Milo Greene in 2009. He is also married to actress Elizabeth Olsen, with whom he wrote a book on self-care. We would like to show you a description here but the site won’t allow us.