The Big Bang Theory costars Kaley Cuoco and Johnny Galecki dated from 2008 to 2009 and have maintained a close friendship. Take a look back at their relationship timeline ...

Johnny Galecki and Kaley Cuoco secretly dated from 2008 to 2009 and played love interests on The Big Bang Theory at the same ...

Johnny Galecki and Kaley Cuoco in 2018. (Photo: Kevin Mazur/Getty Images) The former couple, who dated for two years while working on the CBS hit comedy, spoke openly about how they couldn’t ...

Kaley Cuoco and Johnny Galecki pulled back the curtain on the moment they fell in love filming “The Big Bang Theory.” The former co-stars, who dated in real life from 2008 to 2010, ...

Kaley Cuoco and Johnny Galecki fell in love as their characters of Penny and Leonard did on ‘The Big Bang Theory’ and dated between 2008 and 2010.

Kaley Cuoco and Johnny Galecki opened up about the 'Big Bang Theory' scene that made them fall in love in real life. ... secretly dated from 2008 to 2010.

Kaley Cuoco and Johnny Galecki's chemistry was so off the charts during "The Big Bang Theory" that they took their on-screen romance into the real world. While their characters ultimately ended up ...

Kaley Cuoco and Johnny Galecki's onscreen chemistry as Penny and Leonard on "The Big Bang Theory" came from a very ... though Cuoco briefly dated Al Santos in 2007, the first year "The Big Bang ...

Kaley Cuoco and Johnny Galecki’s reunion created a big bang online. The actors appear in an ad for the video game Royal Kingdom together, six years after the finale of their CBS sitcom “The ...

Kaley Cuoco and Johnny Galecki’s reunion created a big bang online. The actors appear in an ad for the video game Royal Kingdom together, six years after the finale of their CBS sitcom “The ...

Kaley Cuoco Says 'I Only Had Eyes for' 'Big Bang Theory' Costar Johnny Galecki: 'This Is Going to Be Trouble' Meanwhile, Cuoco, 36, added that Galecki still gets "nostalgic about that moment." ...

Kaley Cuoco and Johnny Galecki are reflecting on their romance while starring in “The Big Bang Theory.” The actors and former couple recalled having feelings for one another while shooting the ...