The couple exchanged vows at the New York City Hall in a civil ceremony on Monday morning, after four years of dating, reports aceshowbiz.com.
No other details about their wedding ceremony have been revealed, but it was said that it was simple.
Macgregor is a Los Angeles-based book reviewer and novelist who works as an associate editor at the Los Angeles Review of Books.
The couple began dating back in 2012, just months after Hall split from then-wife Jennifer Carpenter.
He was married to Carpenter from 2008-2011.
His first marriage was to actress Amy Spanger in 2002. They split up in 2007.
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