12:30 PM PT -- According to the docs -- obtained by TMZ -- Michael and Jennifer want joint physical and legal custody of their 16-year-old daughter. It appears they'll work out dividing their assets privately including a couple vehicles and several bank accounts.

8:38 AM PT -- Michael tells us the decision to split with Jennifer was an amicable one and they went to court to file the docs together. They've been in the process of splitting amicably since June 2017 but that was delayed when production on "Roseanne" abruptly stopped.

Michael Fishman, famous for playing Roseanne Barr's TV son, is on the road to ending his marriage with wife Jennifer Briner after more than 19 years of matrimony.

Jennifer filed docs Thursday for legal separation. The couple tied the knot in 1999, when Michael was a teenager, and have two children together. It's unknown what led to the split.

Michael played D.J. Conner as a child actor on "Roseanne" from 1988-97, and reprised the role for this year's reboot.

We got him back in October outside NBC Studios in NYC where we asked him about Barr's departure from the show, and he called continuing the program without her "bittersweet."

As you know, Roseanne's character was killed off the show by an opioid overdose during the season premiere. Ratings for the reboot's second premiere were significantly less than the first ... (10.8 million vs. 18.2 million).