Kaufman met Australian-American
actress Poppy Montgomery
in 2005 in Mexico while working on the independent film Between.
In 2010 they worked together again in the TV movie Lying to Be Perfect
. At the time Montgomery played the role of FBI agent Samantha Spade
on the CBSmystery drama Without a Trace
. Kaufman began a recurring role, making his first appearance in March 2007 with season 5: episode 19 titled "At Rest
" as Brian Donovan, Samantha's love interest for the rest of the series. In June 2007, Montgomery announced her pregnancy with Kaufman, which was written into the sixth season
. On December 23, 2007, Montgomery gave birth to their son Jackson Phillip Deveraux Montgomery Kaufman in Los Angeles
It was reported on October 10, 2011, through Life & Style
, that Kaufman and Montgomery broke up due to the distance between them when working.