Chris Hemsworth appears to have a tense conversation as he stands beside his private jet in Sydney

Chris Hemsworth appeared tense when he was spotted on the tarmac at Sydney Airport on Wednesday.

The 37-year-old Thor star seemed to have been having a serious conversation as he spoke on his mobile phone.

Standing alongside his private jet, Chris paced up and down as he talked on his phone, before finally getting on the plane.

An airport shuttle bus drove past as he chatted, but both Chris and the driver appeared unfazed. 

He continued to talk on his phone as he climbed up the stairs and onto the plane, before flying back home to Byron Bay.

The Hollywood hunk had been in Sydney for work commitments, before heading back home to his family.

He was accompanied by a male assistant, who trailed behind him as he stepped onto the plane.

Chris was dressed casually for the flight, stepping out in baggy black tracksuit pants, which he paired with a cream-coloured hooded sweatshirt. 

He appeared to have been wearing a white T-shirt underneath, and rounded out his sporty ensemble with taupe-coloured high-top sneakers with stars.

It was announced on Sunday that Chris had made the Queen’s Birthday honours list.

He was appointed a Member of the Order of Australia (AM) for his contribution to the performing arts and ongoing charity work.

In addition to supporting a variety of wildlife conservation charities, Chris is a patron for the Australian Childhood Foundation and donated $1million to the 2019 bushfire appeal.