Mrs Brown's Boy's aired its second festive special on Friday night, as fans were overjoyed to see the show return.

And it even contained an outtake scene between Agnes Brown (Brendan O'Carroll) and Winnie McGoogan (Eilish O'Carroll).

Agnes and Winnie were discussing the fact that Agnes had discovered her husband Redser Brown had fathered an illegitimate son.

Struggling to get to grips with the word "illigitemate", Winnie asked: "Have you decided what you're going to do about Redser's interlitimate son?"

The actors, who are brother and sister in real life, burst out laughing

Agnes replied: "I contacted him, I told him to call over here."

"Oh, when?" asked Winnie.

"Whenever he likes," replied Agnes.

Winnie said: "Oh, well you don't seem very put out, Agnes."

Eilish O'Carroll realised her error and covered her face

Trying not to laugh, Agnes replied: "That's a different scene."

Realising her error, Winnie replied: "It's a different scene completely."

The pair, who are brother and sister in real life, collapsed into giggles before attempting the scene once more.

Mrs Brown's Boys often breaks the fourth wall

"Oh you'll be very nervous!" said Winnie.

"Well, not now because of you!" joked Agnes, as the actors laughed again.

"Okay that's a wrap!" said Agnes.

That was not the only time the show became aware of itself - as the vicar, Father Damien, kept appearing in scenes.

The stars attempted the scene again after their first gaffe

But each time, Agnes told him he was not supposed to be in this episode.

"Oh, but I've got a script?" he replied confusedly.

One viewer tweeted: " #MrsBrownsBoys quoting lines from the wrong scene but they keep it in".

"My tummy hurts from all of the laughing at #MrsBrownsBoys I don't think the script was needed the amount it was ignored," wrote another.

A third added: "Another funny episode of @MrsBrownsBoys one thing for sure is that it never fails to make me laugh #MrsBrownsBoys".

* Mrs Brown's Boys is available now on BBC iPlayer