Galecki was born in Bree, Limburg, Belgium to American parents of Polish, Irish, and Italian descent. His mother, Mary Louise (Mary Lou) Noon, was a mortgage consultant, and his father, Richard Galecki, was a mem… See more

After working in the Chicago theatre scene as a young child, Galecki made his onscreen acting debut in the 1987 CBS miniseries Murder Ordained with JoBeth Williams and future Roseanne co-star John Goodman. … See more

As a teenager, Galecki dated his Roseanne (and later The Big Bang Theory) co-star Sara Gilbert (their characters also dated). During their relationship, Gilbert came out as lesbian. They remain close friends.
While worki… See more