It's a big week for the 'Big Bang Theory' star.
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.
Ahead of the sitcom's two-part series finale, ET takes a look at how the actress has evolved over 12 amazing seasons.
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.
After 12 seasons, the beloved comedy's series finale will air on May 16 at 8 p.m. on CBS.
ET was on the set of the hit show as they filmed their first season.
ET spoke with Kaley Cuoco about the long-running series' finale episode, airing May 16 on CBS.
The actress told ET she's all cried out after an emotional few days wrapping the beloved sitcom after 12 seasons.
The co-stars filmed their final episode together the day before.
"This is the greatest cast in the world," Kaley Cuoco dishes to ET's cameras. The 'Big Bang' finale airs Thursday, May 16 on CBS.
