Celeste Barber looks downcast as she walks alone through Sydney Airport in first public sighting after split from 'hot husband' Api Robin

Celeste Barber cut an uncharacteristically downcast figure as she arrived at Sydney Airport on Wednesday, two months after her split from husband Api Robin.

The 43-year-old Australian comedian appeared glum as she strolled through the terminal wearing tinted sunglasses and a pair of oversized headphones. 

She kept her head down as she moved quickly past other travellers, seemingly intent on keeping to herself. 

Celeste may well be jetting off overseas ahead of her stand-up comedy show, Backup Dancer, in Europe this month.

She was dressed for cooler weather in an oversized black jacket worn over a matching top, teamed with jeans and sneakers. 

At times, she paused to check her phone, before continuing through the busy airport.

The sighting comes after Celeste publicly addressed her split from 'hot husband' Api Robin, weeks after news broke of their shock separation.

The Wellmania star shared a video to her Instagram Stories, promoting a mascara from her makeup brand BOOIE, during which she broke her silence.

In her typical fashion, the entertainer joked she was only 'going to talk about mascara, and that's all we're going to talk about – how great this mascara is'. 

However, she finished the short clip by leaning in close to the camera and whispering: 'Thank you for all your lovely messages. I really appreciate it. Thank you.'

Api confirmed the couple had decided to end their marriage after 20 years together, a day before Valentine's Day.

'The past few months have been incredibly challenging and deeply heartbreaking for us both,' an Instagram post captioned 'Heavy hearts' began.

'After much reflection, the decision has been made to separate.

'There is still love and respect between us, but sadly we are at capacity and have come to recognise we may want different things.' 

'Our priority remains our children and their wellbeing. We kindly ask for privacy and understanding as we navigate this,' he continued.

While most were blindsided by the breakdown of their seemingly strong marriage, a glance at their online footprint and previous interviews reveals there have been signs of trouble in paradise for years, with the pair being curiously absent from each other's feeds in the lead-up to their split.

They share two sons named Lou Robin and Buddy Robin, while Api has two daughters from a previous marriage.