Despite their off-screen relationship ending, their beloved characters Penny and Leonard ended up getting married in the first episode of season nine, which aired in September 2015, and then wed again in season 10 which aired in 2016.
are all good friend, as they're often seen sharing sweet snaps on social media of them goofing around on set.
She's been in a relationship with equestrian Karl Cook for almost a year.
"This is the first time I've ever talked about it, ever.
It was a wonderful relationship but we never spoke a word about it and never went anywhere together.
I get the curiosity, but I don't want to distract from the story." The duo have appeared together on the hit CBS comedy since 2007, and in 2010 Cuoco told CBS Watch that they had dated for "almost two years." "It was such a huge part of my life and no one knew about it," she said then.
"It was a wonderful relationship, but we never spoke a word about it and never went anywhere together." The now-27-year-old actress agreed with Galecki at the time that they should be on the QT to help the show.
"Everyone was always asking, and we deny-deny-denied," she said.
"And I'm like, 'Why am I denying this person that I love?
We've seen that happen on other shows." Since their break-up, the couple have continued to be close friends, even meeting each other's partners and goofing around at awards shows.
Were they just always destined to be better as friends than as boyfriend and girlfriend?
"No scandals/home wreckers/pregnancies here, y'all. Just profound friendship," Galecki captioned a shot of him on Instagram with his former girlfriend, while Cuoco joked, "Leonard and Penny will just have to suffice!
Johnny Galecki is no kiss-and-tell man: It's been three years since his split with "Big Bang Theory" co-star Kaley Cuoco, and he's just now opening up about their secret relationship. "We're dear friends, still," the 38-year-old actor told CBS Watch! "She's not an ex, she's a part of my life." But the reason this relationship hasn't been talked about more publicly is that the duo kept it secret while it was happening for professional reasons. And not because I'm trying to be enigmatic; I just worry that it will conflict with people's acceptance of ("BBT" characters) Leonard and Penny....
The couple was "so protective of ourselves and the show, and we didn't want anything to ruin that," she said.