
No, Johnny Galecki and Kaley Cuoco are not a couple. The duo initially met on the sets of The Big Bang Theory in 2007; however, they were in relationships with different people. After their probable breakups, they started dating in 2008 and broke up in 2009. Since then they have been friends—or friendliest exes would be a better term.
In an excerpt from The Big Bang Theory: The Definitive Inside Story of the Epic Hit Series provided exclusively to Vanity Fair, Kaley Cuoco admitted, "I was totally not even hiding it; he has such swagger; at the time, both of us were dating, but I had my eyes set on Johnny; then, when I discovered that he had feelings for me as well, I thought, Oh no, this is going to be trouble."
After their split to this date, fans and media kept asking their stance on a relationship, and they have been denying it ever since. They are just close-friends.
How did Kaley & Johnny become a couple?
The couple fell in love off-screen sometime in 2008 after meeting on set. They wrote in The Big Bang Theory: The Definitive Inside Story of the Epic Hit Series that they truly understood their feelings for one another during the shooting of episode "The Nerdvana Annihilation" of season 1, in which Leonard imagines saving Penny from an elevator shaft using superhero skills.
Cuoco recalled the scene, saying, "I guess we fell a little in love in that elevator shaft.” Galecki concurred, saying, "We felt something, yeah, I think that was a massive turning point; at that point, both she and I knew that something mutual was felt, and that it was going to be more of a distraction from the work to try and continue to ignore it than to actually recognize it and surrender to it."
The two started dating after Cuoco broke up with her then-boyfriend and managed to keep their relationship a secret for a long time. Galecki decided to keep their relationship private because he was concerned about what the audience would think, as they wanted Leonard and Penny to be together so desperately that they could lose interest if they saw them together in reality, according to Cuoco.

Why did Johnny and Kaley break up?
After dating for about two years, the couple quietly ended their relationship before the 2009 holidays. They said that their breakup was a result of them desiring and seeking different things, according to The Big Bang Theory: The Definitive Inside Story of the Epic Hit Series.
Galecki confirmed that it was fun to teach each other about different things, but it became more complicated when it came to what they wanted. Their life experiences and desires were completely different from each other; thus, their wants were mismatched.
Cuoco went on to state that their relationship had simply reached its peak: "Johnny and I also ran out of topics to discuss because we would spend the entire day at work before returning to one of our shared places and asking, So how was your day? Simon was funny today, right? We would laugh because we had no mystery, but we spent a lot of time together, we truly adored one another, and we were fortunate in that there was no malice involved in our separation; rather, our relationship simply came to an end." However, Cuoco admitted that there was a bit of hurt, but it didn’t take them long to come back to who they were and be friends again.
The desire for different things made sense in 2010, when Cuoco opened up about their relationship in an interview with CBS Watch! She said that the secrecy of their relationship led to their breakup, as she didn’t want to keep it a secret that she loves Johnny. She didn’t approve of the hiding part because they weren't able to go out or do anything publicly. Apparently, it wasn’t as fun as they assumed it to be.
Were the rumours of them dating true?
No, according to Johnny and Kaley, the two of them haven’t dated again; in fact, they kept on clarifying the rumors about them dating. A problem arose for Kaley during her divorce (2015) from Ryan Sweeting (she married him in 2013), when rumors spread that "Johnny and Kaley came back together" and it became the talk of the town. This was something Kaley didn’t want, as it was not her desire to hurt Ryan. So, she tried her best to deny such assumptions by the fans.
Raising the question of awkwardness or any issues between Johnny and Ryan, Cuoco recalls Johnny sitting on the first row with a big smile on her wedding day. He got along very well with Ryan, and Ryan also loved him. Johnny and Kaley were just best friends who broke up back in 2009. They moved on and led happy-separate lives.

FAQs
Q. What is the net worth of Johnny Galecki?
A. As of October 2022, Johnny has amassed a net worth of $60 million, working as an actor in multiple shows and movies.
Q. Who is Ryan Sweeting?
A. Ryan Sweeting is a former professional tennis player from the Bahamas. He won the US Junior Open title in 2005 and was previously ranked No. 2 in the world. In 2006 and 2007, he substituted as a training assistant for US Davis Container groups.
Q. Who is dating Kaley, now?
A. Tommy Pelphrey, an American actor, is the man Kaley Cuoco is currently dating. In movies like Mank, American Murderer, and the upcoming She Said, Tommy has made appearances.
Q. Who is dating Johnny, now?
A. Johnny Galecki is dating Alaina Meyer, an American model, they have been dating since 2018.