Neighbours shares first look at Mischa Barton’s debut as the mysterious character Reece on iconic soap as her X-rated storyline with actor Xavier Molyneux kicks off

Mischa Barton has kicked off her raunchy storyline on Neighbours as she makes her debut as the mysterious American character named Reece Sinclair. 

The OC star, 37, has been filming some X-rated scenes with co-star Xavier Molyneux as she joins the hotly-anticipated Amazon Prime reboot of the Australian soap. 

And Channel Ten has shared a first look at the British-born American’s debut on the long-running series which sees her seducing Xavier’s, 26, character Byron Stone. 

Posted to Instagram last Friday, the footage shows Reece attempting to get help with her bags as she checks into the Lassiters Hotel owned by Paul Robinson. 

After being snubbed by the receptionist who was struggling to get her computer working, Paul assigned Byron, Jane Harris’ son, to help Reece. 

As the clip ends, Reece is seen getting onto the elevator with the hunky hotel worker, who moonlights as a male escort, and things appear to get steamy.

A new trailer released last month teased Reece’s real identity, as her secrets appear to get uncovered after her arrival. 

She and Byron share an intimate smooch in the lift during their first meeting and she quickly starts to cause drama in Erinsborough as they strike up a romance. 

Mischa Barton, 37, (pictured) has kicked off her raunchy storyline on Neighbours as she makes her debut as the mysterious American character named Reece Sinclair

The OC star has been filming some X-rated scenes with co-star Xavier Molyneux, 26, (pictured) as she joins the hotly-anticipated Amazon Prime reboot of the Australian soap

At one point, he tells her, ‘I do really want to know more about you,’ before they were shown growing closer during a beach date.

However, their romance doesn’t run smoothly as Byron accuses the mysterious newcomer of ‘keeping secrets’.

Teasing her cryptic identity, Byron then angrily asks her, ‘Why didn’t you tell me who you are?’ while holding up a piece of paper.

And Channel Ten has shared a first look at the British-born American’s debut on the long-running series which sees her seducing Xavier’s character Byron Stone

The reboot of the long-running soap opera, which returns in September, is set two years after the events of the season finale last year. 

The new chapter of the hit Australian drama will launch on Prime Video Australia and New Zealand on Monday, September 25.

In Australia, Network 10 will retain first-run rights for the series, and episodes will be available ad-free on Prime Video seven days later.

Internationally, Neighbours will be available on Amazon Freevee in the UK and the U.S, and Prime Video in Canada, Ireland and South Africa.

A new trailer released last month teased Reece’s real identity, as her secrets appear to get uncovered after her arrival