Melissa Gilbert has separated from Bruce Boxleitner, her husband of 16 years.

Gilbert released a statement (via PEOPLE) relaying the news. "We have loved each other for a very long time and we share four incredible sons together. On behalf of our family we ask to be allowed our privacy during this very difficult time."

The pair's relationship had a rocky beginning. Boxleitner, who starred as the title character in both the original 'Tron' and the recent Disney sequel 'Tron: Legacy,' called off his engagement to Gilbert twice before the two finally tied the knot in 1995.

The couple welcomed their only child together, Michael Garrett Boxleitner, named in honor of Gilbert's 'Little House' co-star Michael Landon, that same year