The Big Bang Theory

The Big Bang Theory actress filed for divorce in September after 21 months of marriage.

From her personal life to beginnings on the small screen, here's some interesting facts about the birthday girl...

Lead ion collisions at over a 1000 TeV help create very high temperatures.

Kaley Cuoco and Johnny Galecki are rumoured to still have feelings for each other.

Kaley Cuoco and Johnny Galecki are not dating again.

Kaley Cuoco and Ryan Sweeting had a hard time before announcing divorce.

Lake Baikal in Siberia to house Russia's Dubna telescope to net neutrinos.

The high energy gamma rays expected in such a thunderstorm production was not seen.

Channel will not it show Hollyoaks or Big Bang Theory for 12 hours to encourage youths to get out and vote

Kaley Cuoco and Ryan Sweeting are allegedly having fights over starting a family.

Physicists put forward theory that universe has no beginning and no end.

The Big Bang Theory episode 14 will see Sheldon and Leonard dealing with an online hater.

The actress' new film opened the 2015 Sundance Film Festival

The Big Bang Theory's 13th episode is put on hold until January 29th, 2015.

Kaley Cuoco-Sweeting also recently won the Favorite Comedic TV Actress award at People's Choice Awards

Sheldon and Leonard will have a heart-to-heart conversation in the upcoming episode.

Kaley Cuoco-Sweeting slams rumours claiming that the star had got a nose job done.

All shows are set to return between January and March, 2015

Check out the full list of the Screen Actors Guild Awards 2015 nominations.

The Big Bang Theory Season 8 returns with an all new episode today, 20th November.

The Big Bang Theory Season 8 returns with an all new episode today

How the actress's death will affect the show, is unclear as of now

In The Septum Deviation, Sheldon will overreact when Leonard has to undergo a minor surgery.

Portion of adults who lived with roommates increased to 32% in 2012, compared to 25.4% in 2002, according to Zillow.

In The Prom Equivalency, Sheldon and his group try to re-enact their high-school prom.

This episode is likely to feature a memorable moment between Sheldon and Amy.

The Big Bang Theory Season 8 episode 7 airs today, Thursday, 30th October on CBS.

The Big Bang Theory Season 8 episode 6 airs today, Monday, 20th October at 8:00 pm ET on CBS

Watch Christian minister Ray Comfort's 'Banana Argument'

Kaley Cuoco went from long blond hair to pixie cut.