The couple were spotted taking a hike in LA together in May of last year, reported Us magazine.
Graf specializes in trademarks and patents, according to his company bio. "When he is not trying to be an inventor himself, he enjoys Ultimate Frisbee, tennis, cooking and exploring new cities and countries," his bio says.
The "Parks and Recreation" alum was previously married to Will Arnett for nine years from 2003 to September 2012. They share two sons, Archie, eight, and Abel, six.
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