Elizabeth Bogush – Lukas Reiter : Married (2005 to Present)
The Big Bang Theory’s Dr. Catherine Millstone is played by Elizabeth Bogush. Dr. Millstone is a scientist who got intrigued by the essay Raj wrote on Kuiper belt. However, this is not her first outing as an actress since she had appearances on TV shows like Scrubs, NCIS: Los Angeles, and The Young and the Restless. She and Lukas Reiter wed in 2005. He once wrote for TV shows such as Boston Legal, but he currently works as an executive for television.
Nathan Fillion – Krista Allen : Dating (2015 to Present)
Many people most likely remember Nathan as Captain Malcolm Reynolds on the popular sci-fi series Firefly. On TBBT, he plays himself. Last year, Nathan started going out with actress Krista Allen. She was born in California but grew up in Houston and went on to live in Austin, Texas. She has also lived in many parts of the US. She has had two marriages and even dated actor George Clooney at some point in the past.