Though she captioned the post, "Look at how happy we are!!
As a child, he was well known for making up long stories and tales.
In such situations, his mother used to make him play the "quiet game", where he had to see how long he could go without talking.
In 1989, Galecki portrayed Rusty Griswold in National Lampoon's Christmas Vacation.
In 1990, he was cast as Danny Nash, the son of Robert Urich's lead character, on the NBC comedy American Dreamer; the following season, he was a regular cast member on the ABC sitcom Billy, a spin-off from Head of the Class.
Galecki was cast in the 1997 summer slasher I Know What You Did Last Summer and the 1998 dark comedy The Opposite of Sex.
In the year 2000, Galecki reunited with Opposite of Sex director Don Roos, who cast him in Bounce.
He was originally asked to play the role of Sheldon Cooper, but he said he was better suited for the role of Leonard Hofstadter, and Sheldon's role was eventually given to Jim Parsons.
During his role as David Healy on Roseanne, Sara Gilbert played his longtime girlfriend and later wife, Darlene Conner.
Galecki posted a photo of the two backstage and captioned it, "The Beggar and the Beauty," referring to his scruffy beard and hairdo.