Newsreader gets caught 'daydreaming' while live on air and her reaction is priceless

You may not have heard of Natasha Exelby before, but she's recently shot to the attention of the public outside of her native Australia.

The ABC newsreader has brought joy to thousands of people with her unscripted and very expressive reaction to being caught off-guard while live on air.

Natasha was scheduled to introduce the sports segment after footage of a prerecorded section finished.

At the end of this part the programme directors decided to cut back to the studio.

It was at this point the cameras caught her, head down and engrossed in fiddling with her pen.

It took Natasha a couple of seconds to realise she was back on camera.

The penny did eventually drop - and Natasha's reaction was brilliant.

Clearly shocked and taken by surprise, she lets out a loud gasp, eyes wide open and throws down the pen.

But, being the consummate professional, she does manage to throw to the sports section.