She has made millions laugh with her hilarious celebrity parody videos.

But comedian Celeste Barber was not amused on Friday when she was seated next to an inconsiderate passenger on a flight from Sydney Airport.

The 39-year-old revealed on Instagram the woman next to her 'took her mask off to sneeze' soon after take-off.

Celeste shared a photo from the plane of herself squished right next to the window.

She kept Covid-safe by wearing a KN95 face mask, which is said to be more effective in reducing the risk of transmitting airborne infectious diseases.

But the woman next to her didn't share the same concerns about catching the virus.

'The woman next to me on this flight just TOOK HER MASK OFF to sneeze,' wrote an unimpressed-looking Celeste.

Before her flight, Celeste shared a video of the queues at the airport to the soundtrack of It's Oh So Quiet by Björk as holidaymakers jetted off for the Easter holidays.

Celeste, who boasts 8.9 million Instagram followers, is known for her hilarious celebrity parody videos.

She is the lead actress and producer of the upcoming Netflix series Wellmania. 

It comes after Celeste pondered whether she should stop posting comedic content following the Russian invasion of Ukraine.

She said on Instagram in February: 'I don't know what to do. I want to keep posting funny, fun content and to try and put some laughter out in the world, but it's a lot.' 

The funnywoman added through tears: 'It's so overwhelming what's happening in the world. It's tricky.'

'Laughter is so important and I want to keep doing that and giving you all love... but it's just so much. I'm just so sad for everyone and sending love to those who really f**king need it.'