Big Brother 2021: Three contestants are revealed as host Sonia Kruger is pictured on set

Spoiler alert! Big Brother 2021’s first three contestants are revealed as host Sonia Kruger, 55, shows off her incredible legs in a short mini dress

Filming has commenced for Big Brother Australia 2021.

The first set of contestants for next year’s show have entered the purpose-built compound on Manly’s North Head in Sydney on Monday. 

Daily Mail Australia understands at least six contestants have entered the house so far, with several intruders also scheduled to join over the next few days. 

Action! Filming has commenced for Big Brother Australia 2021. Host Sonia Kruger (left) was pictured welcoming the housemates into the complex on Monday

Three contestants were seen being interviewed by host Sonia Kruger before they entered the house.

Sonia was seen chatting to a female raven-haired beauty, who wore lime coloured ensemble with matching furry slippers. 

The second contestant to enter was a blonde, who couldn’t wipe the smile off her face while chatting to the host.

Diverse: Three contestants were seen being interviewed by host Sonia Kruger before they entered the house

Diverse: Three contestants were seen being interviewed by host Sonia Kruger before they entered the house

Excited: Sonia was seen chatting to a female raven-haired beauty, who wore lime coloured ensemble with matching furry slippers

Excited: Sonia was seen chatting to a female raven-haired beauty, who wore lime coloured ensemble with matching furry slippers

Do you know her? The second contestant to enter was a blonde, who couldn't wipe the smile off her face while chatting to the host

Do you know her? The second contestant to enter was a blonde, who couldn’t wipe the smile off her face while chatting to the host

Sonia couldn’t wipe the smile off her face as she introduced the third male contestant – a flamboyant and hilarious character, who at one stage was seen dancing with the host. 

The 55-year-old television presenter looked sensational as she flaunted her toned physique in a striped padded shoulder mini-dress.

Sonia appeared to have trimmed her signature blonde tresses, and rocked a new bob cut for the upcoming series. 

Fun: Sonia couldn't wipe the smile off her face as she introduced the third male contestant - a flamboyant and hilarious character, who at one stage was seen dancing with the host

Fun: Sonia couldn’t wipe the smile off her face as she introduced the third male contestant – a flamboyant and hilarious character, who at one stage was seen dancing with the host

New look: The 55-year-old television presenter looked sensational as she flaunted her toned physique in a striped padded shoulder mini-dress

New look: The 55-year-old television presenter looked sensational as she flaunted her toned physique in a striped padded shoulder mini-dress

New look: The 55-year-old television presenter looked sensational as she flaunted her toned physique in a striped padded shoulder mini-dress

Daily Mail Australia understands the housemates were originally scheduled to enter the house on Saturday, but were forced to reschedule after hazard reduction burning jumped containment lines on Sydney’s North Head. 

An Endemol Shine Australia spokesperson confirmed the house had been evacuated.

‘Due to the impact of a prescribed hazard reduction burn at North Head, the Big Brother crew onsite were safely evacuated,’ the spokesperson said.

Change up: For the first time, contestants entering the house were cheered by live audience, who included Marissa Rancan from last year's season

Change up: For the first time, contestants entering the house were cheered by live audience, who included Marissa Rancan from last year’s season

Delays: Daily Mail Australia understands the housemates were originally scheduled to enter the house on Saturday, but were forced to reschedule after hazard reduction burns jumped containment lines on Sydney's North Head

Delays: Daily Mail Australia understands the housemates were originally scheduled to enter the house on Saturday, but were forced to reschedule after hazard reduction burns jumped containment lines on Sydney’s North Head

'Due to the impact of a prescribed hazard reduction burn at North Head, the Big Brother crew onsite were safely evacuated,' the spokesperson said

‘Due to the impact of a prescribed hazard reduction burn at North Head, the Big Brother crew onsite were safely evacuated,’ the spokesperson said

‘Filming is yet to commence and production will resume when it is safe to do so.’ 

For the first time, contestants entering the house were cheered by live audience, who included Marissa Rancan from last year’s season.

All crew and audience members were required to wear black face masks as a COVID-19 safety precaution. 

As there is no air date set for Big Brother Australia 2021, it’s safe to assume a portion of the series will be pre-recorded and aired later in the year. 

New look: Daily Mail Australia recently revealed the house, situated in Sydney's Manly, has undergone a major refurbishment ahead of the arrival of its new housemates

New look: Daily Mail Australia recently revealed the house, situated in Sydney’s Manly, has undergone a major refurbishment ahead of the arrival of its new housemates

Change: The biggest visible difference so far is the backyard, as furniture is swapped out for brighter, blue decor, and timber is darkened around the walls and floors

Change: The biggest visible difference so far is the backyard, as furniture is swapped out for brighter, blue decor, and timber is darkened around the walls and floors