Family affair! Luke Hemsworth celebrates his milestone 40th birthday with sister-in-law Elsa Pataky and brother Liam at a Byron Bay cafe

He's the eldest sibling of brothers Chris and Liam Hemsworth.

And on Thursday, Luke Hemsworth celebrated his milestone 40th birthday with his famous family at Byron Bay's The Roadhouse cafe.

The actor mingled with his wife Samantha Hemsworth, Liam and his girlfriend Gabriella Brooks, sister-in-law Elsa Pataky, and his parents Craig and Leonie. 

Family affair! Luke Hemsworth (centre) celebrated his milestone 40th birthday with his family at a cafe in Byron Bay, New South Wales on Thursday

Family affair! Luke Hemsworth (centre) celebrated his milestone 40th birthday with his family at a cafe in Byron Bay, New South Wales on Thursday 

Luke cut a bold figure in a leopard print button-up shirt, teamed with pants, a black cap worn backwards and reflective sunglasses.

The Crypto star appeared relaxed and at ease as he chatted with his loved ones at the popular eatery in the coastal town. 

Chris' wife Elsa, 44, was all smiles as she shared a warm embrace with Gabriella at the table. 

Birthday boy: The Westworld star cut a bold figure in a leopard print button-up shirt, pants, a black cap worn backwards and reflective sunglasses

Birthday boy: The Westworld star cut a bold figure in a leopard print button-up shirt, pants, a black cap worn backwards and reflective sunglasses 

Friendly: Luke's sister-in-law Elsa Pataky (pictured centre) warmly embraced Liam Hemsworth's girlfriend Gabriella Brooks (left)
All smiles: Elsa was all smiles as she mingled at the eatery

Gesture: Sister-in-law Elsa Pataky, 44, warmly embraced Liam Hemsworth's model girlfriend Gabriella Brooks (left), 24

Gorgeous: Elsa was pictured arriving at the venue with Luke. The Spanish beauty showed off her signature boho style in a beige T-shirt, tucked into a floral print maxi-skirt

Gorgeous: Elsa was pictured arriving at the venue with Luke. The Spanish beauty showed off her signature boho style in a beige T-shirt, tucked into a floral print maxi-skirt 

Gabriella, 24, wore a casual ensemble, which she teamed with vintage-style sunglasses, and allowed her brunette locks to flow effortlessly around her face. 

Elsa, who was pictured arriving at the venue, showed off her signature boho style in a beige T-shirt, tucked into a pink floral maxi-skirt.

The Spanish stunner added tan sandals to the look, as well as a leather belt, brown crossbody bag and delicate gold jewels.

Penchant for fashion: Elsa teamed her top and shirt combination with tan sandals, a leather belt, a brown crossbody bag and delicate gold jewels
Natural beauty: She styled her blonde locks back off her face, and looked to have gone makeup-free

Details: The mother-of-three teamed her ensemble with tan sandals, a leather belt, a brown crossbody bag and delicate gold jewels 

Social: Elsa engaged in friendly conversation with a well-dressed female outside of the eatery

Social: Elsa engaged in friendly conversation with a well-dressed female outside of the eatery 

Elsa swept her blonde locks into an effortless topknot, and looked to have gone makeup-free, allowing her natural beauty to shine through. 

Husband Chris, 37, was not pictured arriving, perhaps looking after the couple's children, daughter India Rose, eight, and twin sons Tristan and Sasha, six. 

Brother Liam, 30, however was in attendance, donning a casual ensemble, and joining parents Craig and Leonie at the table.  

Loved ones: Luke's brother Liam Hemsworth (far right), 30, wore a casual black ensemble and was seated with his parents Craig and Leonie Hemsworth

Loved ones: Luke's brother Liam Hemsworth (far right), 30, wore a casual black ensemble and was seated with his parents Craig and Leonie Hemsworth 

Thirsty work: Luke enjoyed cocktails with his family
All smiles: Gabriella was all smiles, as she engaged in conversation with Liam's family

Birthday treats: Luke enjoyed cocktails with his family at the trendy eatery

Off-duty model: Gabriella, 24, looked every inch the off-duty model in a casual ensemble, teamed with vintage-style sunglasses. Her brunette tresses framed her face and shoulders

Off-duty model: Gabriella, 24, looked every inch the off-duty model in a casual ensemble, teamed with vintage-style sunglasses. Her brunette tresses framed her face and shoulders 

Luke, who lived in Los Angeles for seven years, moved to Byron Bay with wife Samantha and their children.

The Westworld star told Who magazine in March that it's a 'win-win', living so close to his famous brothers. 

'It's awesome. The change of lifestyle is beautiful. Mum and Dad can walk to our house. My kids are going to an amazing school called the Living School. 

'There is a juxtaposition between Byron and the incredible vibrancy of everything that's alive and the noise of the bugs and the birds, and LA, which is just traffic noise.' 

Home sweet home: Luke, who lived in Los Angeles for seven years, moved to Byron Bay with wife Samantha and their children

Home sweet home: Luke, who lived in Los Angeles for seven years, moved to Byron Bay with wife Samantha and their children 

Famous sibling: Luke's brother Chris Hemsworth (pictured with Elsa), 37, was not pictured arriving at the venue, perhaps looking after the couple's children, daughter India Rose, eight, and twin sons Tristan and Sasha, six

Famous sibling: Luke's brother Chris Hemsworth (pictured with Elsa), 37, was not pictured arriving at the venue, perhaps looking after the couple's children, daughter India Rose, eight, and twin sons Tristan and Sasha, six