Kaley Cuoco-Sweeting posts sneak peek at her Big Bang Theory wedding… as she reveals how real life husband REALLY feels about her working with ex boyfriend 

Fans of the show have been waiting for this moment since Penny and Leonard first got together. 

And now the couple are finally going to tie the knot.

Kaley Cuoco-Sweeting took to Instagram on Monday ahead of the pair's wedding airing with a photo of herself dressed in her wedding finery as Penny.

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I do! Kaley Cuoco-Sweeting took to Instagram on Monday showing a picture of her nuptials to co-star Johnny Galecki as their characters Penny and Leonard in The Big Bang Theory

I do! Kaley Cuoco-Sweeting took to Instagram on Monday showing a picture of her nuptials to co-star Johnny Galecki as their characters Penny and Leonard in The Big Bang Theory

She can be seen standing next to Leonard, played by her co-star, Johnny Galecki,in what appears to be a chapel.

The 29-year-old captioned the shot: 'I mean it when I say, I've waited for this moment since the pilot! Nine years in the making!!'

The couple will be seen tying the knot in the CBS show on Monday. 

Young love: The couple will say their vows in Monday nights episode of the CBS show

Young love: The couple will say their vows in Monday nights episode of the CBS show

Penny and Leonard have been having an on again off again romance for eight seasons on the much loved comedy series. 

Many thought it would not come to pass after Dr Hofstader's  confession last season about sharing a kiss with a woman when he was at sea.

However in an interview with TVLine, showrunner Steve Molaro dispelled all doubts, revealing that the couple were definitely going through with the ceremony.

The helmer added: 'We’re nine years in and we want to keep things moving forward, as well as exciting and scary and fun.'  

Long time coming: Many thought their might not walk down the aisle after Leonard confessed to kissing another woman last season

Long time coming: Many thought their might not walk down the aisle after Leonard confessed to kissing another woman last season

Since the on-screen couple had no time to prepare for the wedding before jetting off to Las Vegas to get hitched, Penny is wearing a simple, short pink dress with black shoulder straps, and Leonard has on a simple suit.

However she the short haired blonde can be seen in a classic white veil and looks to be carrying a dress-matching bouquet of pink flowers.

As for Sheldon and Amy, there was no indication on whether that couple would figure out their feelings and reunite.

Happy couple: Penny and Leonard have been having an on again off again romance for eight seasons on the much loved comedy series

Happy couple: Penny and Leonard have been having an on again off again romance for eight seasons on the much loved comedy series

A video teaser which was released also reveals the wedding looks like it will be a hilarious affair. 

Meanwhile in an interview with Andy Cohen on Watch What Happens Live, Kaley, who married Ryan Sweeting in 2013 on New Year's Eve, revealed what it was like working with her ex boyfriend - Johnny Galecki who she dated for two years - on the show.

Kaley said: 'We ended it five years ago and we have actually both moved on.

Tricky business: Meanwhile in an interview with Andy Cohen on Watch What Happens Live, Kaley revealed what it was like to work with her ex - she dated co-star Johnny for two years

Tricky business: Meanwhile in an interview with Andy Cohen on Watch What Happens Live, Kaley revealed what it was like to work with her ex - she dated co-star Johnny for two years

Busty display: The Big Bang Theory actress slipped into a glittering maxi dress for her appearance on the chat show

Busty display: The Big Bang Theory actress slipped into a glittering maxi dress for her appearance on the chat show

No hard feelings: She said that her husband Ryan gets on famously with him and there are no issues 

No hard feelings: She said that her husband Ryan gets on famously with him and there are no issues 

Airing her dirty laundry: Kaley and another guest held up a pair of blue lace knickers during a skit

Airing her dirty laundry: Kaley and another guest held up a pair of blue lace knickers during a skit

Dazzling display: Kaley glittered from head-to-toe in the ankle-skimming frock and a pair of sparkly stilettos

Dazzling display: Kaley glittered from head-to-toe in the ankle-skimming frock and a pair of sparkly stilettos

'Johnny is actually one of my best friends - it is a situation that  ended well I understand that sometimes it doesn't. 

Andy exclaimed: 'That could have gone horrible.'

Kaley added: 'Ryan loves him, Johnny loves him. He is one of my best friends.'  

Sparkle into the night with Kaley's plunging dress by Bec & Bridge

Tongues might be wagging about Penny and Leonard tying the knot on the Big Bang Theory, but we’re still chin-wagging about Kaley Cuoco’s style.

The comedy actress stunned in a plunging black dress by Bec & Bridge for a recent TV appearance, finishing the glamorous evening look off with chic updo and a smoky eye.

The sparkly evening dress features a flattering wrap skirt and racer back, and the halterneck plunging design puts a glam, sultry twist on the night-time number.

Worn by the likes of Beyonce, Bec & Bridge is a brand worth investing in, so you won't feel out of pocket when you snap up this opulent creation with a click to the right from Spotted On Celeb.

If you fancy having a gander before purchasing, head to the edit below to snap up some similar alternatives from the likes of Jill Stuart to Herve Leger, all budgets covered!

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Andy Cohen exclaimed: 'That could have gone horrible,' when he asked Kaley about her working relationship with her co-star ex

Andy Cohen exclaimed: 'That could have gone horrible,' when he asked Kaley about her working relationship with her co-star ex

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