'Big Bang Theory' star Johnny Galecki has us in our feels as TV set is torn down ahead of final episode

The Big Bang Theory is set to end in the US on May 16 after 12 seasons, making it TV's longest-running, multi-camera comedy series.

On Tuesday, one of its stars, Johnny Galecki, shared a video on Instagram of the show's sets being torn down as The Beatles' hit "Help!" played in the background.

"Breaking down the @bigbangtheory_cbs sets on Warner Bros Stage 25," the actor wrote in the caption. "Coincidental soundtrack apropos."

Galecki stars as physicist Leonard Hofstadter in the series, which is centred around the lives of a group of geeky friends and the women in their lives.

Galecki told TVLine he was overcome with emotion filming the final episode.

"I ended up being the quivering puddle of tears on the floor. Starting off the show last night was tough," he said the day after. "But then you gotta do your damn job, and put the tears aside and try to make people laugh. It was a terribly, terribly moving night."

By Lisa Respers France, CNN

The final season of The Big Bang Theory airs Tuesdays on Nine and you can catch up on the latest episodes on 9Now.