You could go as far as saying that the following relationship is Leonard Hofstadter’s worst nightmare. At one point, Kaley Cuoco dated actor Henry Cavill, who is most famous for his portrayal of Superman. However, the romance only lasted for a whole 10 days – making it one of the shortest ones on this list.
Their brief fling was just before Kaley met her now ex-husband Ryan Sweeting (who she married after just three months of dating.) The paparazzi were all over this superhero “couple.” Kaley once remarked during an interview, “I had no one following me until I met Superman.” We find that hard to believe.
Simon Helberg and Jocelyn Towne
Simon Helberg plays the iconic Howard Wolowitz, a nerdy aerospace engineer and former astronaut who still lives with his overbearing mother. Eventually, though, he gets married to the sweet Bernadette. In real life, Simon married Jocelyn Towne in 2007. Jocelyn is also an actress and has acted in minor roles in movies and television since 2000.
The two even worked on a film together called We’ll Never Have Paris in which Simon starred as the lead and Jocelyn produced it. The happy couple have two children together, a daughter named Adeline who is five years old, and a son named Wilder who is three.
Johnny Galecki and Kaley Cuoco
The Big Bang Theory fans around the globe were super excited to find out that two of the main stars of the show, who happened to play a couple on the show, were also dating in real life. Leonard and Penny dated both in the show and as Johnny and Kaley from 2008 until 2010.
They tried very hard to keep their relationship as private as possible. Kaley Cuoco said about their relationship, “It was such a huge part of my life and no one knew about it,” she continued, “It was a wonderful relationship, but we never spoke a word about it and never went anywhere together.”
Johnny Galecki and Kelsey Harper
As you know by now, Johnny Galecki plays one of the main protagonist geeks in the show, Dr. Leonard Hofstadter. In the show, he dated blonde bombshell Penny, and eventually tied the knot with her in what many believe is one of the most wonderful romances in the history of television.
Galecki has had several other roles including acting as David Healy in Roseanne. He dated actress Kelsey Harper who also had some big roles of her own. Sadly, it didn't last too long, and she has now retired and works as a florist, which we are guessing is a lot more peaceful!
Nathan Fillion and Krista Allen
Nathan Fillion played himself in one episode of The Big Bang Theory when Raj and Leonard approach him at a deli. Nathan is most recognized for his work in the ABC series Castle as Richard Castle and as Captain Malcolm Reynolds in the sci-fi series Firefly. He has also played a few different roles in each installment of The Guardians of the Galaxy franchise.
In the last few years, the actor had started going out with Baywatch actress Krista Allen, who was previously married twice. She also dated George Clooney for a couple of years until 2004. However, Fillion and Allen went their separate ways in 2020.