By the end of this event, the 'Big Bang Theory' star was blue all over.
Warning! There are some plot spoilers hidden among these on-set observations...
The main stars of the beloved sitcom sat down with Stephen Colbert hours after their long-running series aired its final episode.
ET is breaking down the 'Big Bang Theory' series finale and star Kaley Cuoco is spilling on Penny and Leonard's new "beginning."
The main stars of the long-running sitcom commemorated the end of an era with heartfelt posts on Instagram.
Sheldon would recommend a hot beverage to cheer you up -- but we're going to spill the behind-the-scenes tea instead!
'The Big Bang Theory' hour-long finale airs Thursday, May 16 at 8 p.m. ET/PT on CBS.
Grab some Chinese food, invite your friends over and snag 'your spot' on the couch – we're just days away from the series finale!
With 'The Big Bang Theory' coming to an end, let's take a look back at one of the most enduring relationships on and off screen.
It was a night of BIG changes on 'The Big Bang Theory’s penultimate episode!
ET was on the set of 'The Big Bang Theory' with Galecki and his co-star, Kaley Cuoco
Check out how much your favorite actors are earning on the show!
The show's series finale airs on May 16.
ET was lucky enough to be on set before their big goodbye.
