Sara Gilbert and Johnny Galecki finally reunite as Darlene Conner and David Healy on the Tuesday, April 17 episode of Roseanne, but the two came together off-camera in June 2017 to name their TV son.
http://www.eonline.com/news/927866/how-johnny-galecki-helped-name-his-tv-son-with-sara-gilbert-on-roseanne